SPAU 121 C Overvoltage and undervoltage relay User´s manual and Technical description
B
U > U
Un
1.2 STEP
0.8
1.6
SPCU 1C1 0.5
REGISTERS
0
0
0
t > [ s]
SG1
k>
0
0.05
1 2 3 4 5 6 7 8
U > /U n U max /U n U < /U n U min /U n n (U >) n (U < )
1 2 3 4 5 6 7 8
1.0
0.8
SGR 1 2 3 4 5 6 7 8
t / t >[ % ] t / t
RS 612
1
U
U
Un
1.2 STEP
0.8
1.6
SPCU 1C1 0.5
REGISTERS
0
0
0
t > [ s]
SG1
k>
0
0.05
1 2 3 4 5 6 7 8
U > /U n U max /U n U < /U n U min /U n n (U >) n (U < )
1 2 3 4 5 6 7 8
1.0
0.8
SGR 1 2 3 4 5 6 7 8
t / t >[ % ] t / t
RS 612
1
RESET
4. The green Uaux LED on the front panel is lit when the power supply module operates properly.
U
and U< and located in the right bottom corner of the front plate of the relay module. One indicates operation of the overvoltage stage and the other operation of the undervoltage stage. Yellow light indicates that the concerned stage has started and red light that the stage has operated (tripped). With the SG2 software switchgroup the start and trip indicators can be given a latching function, which means that the LEDs remain lit, although the signal that caused operation returns to normal. The indicators are reset with the RESET push-button. An unreset indicator does not affect the operation of the relay. Power supply and I/O module
3. The red IRF indicator of the self-supervision system indicates, when lit, that a permanent internal relay fault has been detected. The fault code appearing on the display once a fault has been detected should be recorded and notified when service is ordered.
The combined power supply and I/O module (U2) is located behind the system front panel of the protection relay and can be withdrawn after removal of the system front panel. The power supply and I/O module incorporates a power unit, five output relays, the control circuits of the output relays and the electronic circuits of the external control input. The power unit is transformer connected, that is, the primary circuit and the secondary circuits are galvanically isolated. The primary circuit is protected by a slow 1 A fuse F1, located on the PC board of the module. When the power source operates properly, the green Uaux LED on the front panel is lit.
5. The LED indicator below a particular setting knob indicates, when lit, that the setting value of the knob is being displayed. 6. The LED of the SG1 switchgroup indicates, when lit, that the checksum of the switchgroup is being displayed. The start and operation indicators, the function of the SG2 software switchgroup and the functions of the LED indicators during setting are described in detail in the user's manual "Combined overvoltage and undervoltage relay module SPCU 1C1".
The power supply and I/O module is available in two versions with different input voltage ranges: - type SPTU 240S1 - type SPTU 48S1
Uaux = 80...265 V ac/dc Uaux = 18...80 V dc
The voltage range of the power supply and I/O module inserted in the relay is marked on the system front panel of the relay.
7
Technical data (modified 2002-04)
Energizing inputs Terminals Rated voltage Un Continuous voltage withstand Power consumption at Un Rated frequency fn acc. to order Output contact ratings Trip contacts Terminals Rated voltage Carry continuously Make and carry for 0.5 s Make and carry for 3 s Breaking capacity for dc, when the control circuit time constant L/R ≤ 40 ms, at the control voltages - 220 V dc - 110 V dc - 48 V dc Signalling contacts Terminals Rated voltage Carry continuously Make and carry for 0.5 s Make and carry for 3 s Breaking capacity for dc, when the signalling circuit time constant L/R < 40 ms, at the control voltages - 220 V dc - 110 V dc - 48 V dc External control input (blocking) Terminals Control voltage Current consumption when active Auxiliary supply voltage Power supply and I/O modules and voltage ranges: - type SPTU 240 S1 - type SPTU 48 S1 Power consumption under quiescent/operating conditions
8
100 V 13-14 100 V 2 x Un
110 V 13-15 110 V 2 x Un
Start voltage U> 0.8...1.6 x Un Start time 0.1 s, 1 s, 10 s or 60 s Operate time t> at definite time operation characteristic 0.05...10 s Inverse time operation characteristic Curve sets A and B (see manual 1MRS 750609-MUM EN) Time multiplier k at inverse time characteristic 0.05…1.00 Undervoltage stage U< Start voltage U< Start time Operate time t< Inverse time operation characteristic Time multiplier k at inverse time characteristic Data communication Transmission mode Data code Selectable data transfer rates Fibre optic bus connection module, powered from the host relay - for plastic fibre cables - for glass fibre cables Fibre optic bus connection module with a built-in power supply unit - for plastic fibre cables - for glass fibre cables Insulation Tests *) Dielectric test IEC 60255-5 Impulse voltage test IEC 60255-5 Insulation resistance measurement IEC 60255-5 Electromagnetic Compatibility Tests *) High-frequency (1 MHz) burst disturbance test IEC 60255-22-1 - common mode - differential mode Electrostatic discharge test IEC 60255-22-2 and IEC 61000-4-2 - contact discharge - air discharge Fast transient disturbance test IEC 60255-22-4 and IEC 61000-4-4 - power supply - I/O ports Environmental conditions Specified ambient service temperature range Long term damp heat withstand acc. to IEC 60068-2-3 Relative humidity acc. to IEC 60068-2-30 Transport and storage temperature range Degree of protection by enclosure for panel mounted relay Weight of relay including flush mounting case
0.4...1.2 x Un 0.1 s or 30 s 1…100 s Curve set C (see manual 1MRS 750609-MUM EN) 0.1…1.00
Fibre optic serial bus ASCII 300, 1200, 2400, 4800 or 9600 Bd SPA-ZC 21 BB SPA-ZC 21 MM SPA-ZC 17 BB SPA-ZC 17 MM
2 kV, 50 Hz, 1 min 5 kV, 1.2/50 µs, 0.5 J >100 MΩ, 500 Vdc
2.5 kV 1.0 kV 6 kV 8 kV 4 kV 2 kV
-10...+55°C ,k>
SGB/5
TS1
SS2
U
80 81
F
U3
SPAU 121 C
77 78
SERIAL PORT
t inv. time
0
not in use
0
4
0 curve A
0
not in use
0
5
1
blocking of t
to output relay D no tripping of stage U< to output relay D tripping of stage U< to output relay C no tripping of stage U< to output relay A no tripping of stage U> to output relay C tripping of stage U> to output relay B
When the switches are set as above, the output relays of the voltage relay SPAU 121 C provide the following signals: Contact
Function
65-66 68-69 80-81 77-78 70-71-72 73-74-75
Signal on operation of stage U> Operation of stage U< and U> Signal on operation of stage U< Starting of stage U< Self-supervision signal Starting of stage U>
11
Example 2. Motor undervoltage protection
L1 L2 L3
MAIN CIRCUIT BREAKER
M
MOTOR FEEDER CIRCUIT BREAKER
+
+ (~) Uaux - (~) BS
13 14 15
IRF
START2
10 11
61 62
70 71 72
110V 100V
≅_ + SGR/1
73 74 75
E
SIGNAL1
77 78
TRIP2
TRIP1
1 SGR
IRF
3
2 4
C
7
65 66
B
1
1 5
8
SERIAL PORT
A 1 6
SS1
t>,k>
SGB/5
TS1
SS2 U
80 81
F
U3
SPAU 121 C
START1
-
t
IRF
+ -
≅_
U3
70 71 72 10 11 61 62
TIMER START
13 14 15
S2
BS
Uaux
L1
IRF IRF
E
SS1
73 74 75
L2
START2
F
SGR
1
D
3 2 4
7
1
C
5
8
1
B
65 66
TRIP1 TRIP2
68 69 80 81 77 78
L3
L4
START1 SIGNAL1
TIMER STOP
A
- (~ )
+ (~ )
U2
When no relay test set is available the secondary injection test can be carried out with the following equipment:
-
Fig. 6. Secondary injection test circuit for the overvoltage and undervoltage relay SPAU 121 C. When the test circuit has been completed and the selector switches properly set, the auxiliary voltage can be connected to the relay. The
function of the test circuit can be verified by means of a multimeter. 15
Checking the matching transformers
Apply voltage to the relay and compare the voltage value read from the display of the relay with the voltage value shown by the voltmeter.
The measurements can be performed at the rated voltage of the relay.
Checking the overvoltage stage
Set the switches of the SGR switchgroup as follows before starting the test:
Operate time t> Definite time characteristic
Switch
Position
1 2 3 4 5 6 7 8
1 0 0 0 0 0 1 0
The following relay functions are obtained: Output relay (terminals)
Function
A (65-66) B (68-69) C (80-81)
Trip signal of stage U> (Trip signal of stage U Not in use Self-supervision alarm Start signal of stage U>
D (77-78) E (70-71-72) E (73-74-75)
The operation of output relay C is indicated with indicator L3, when it is lit. When the relay starts the LED indicator U> in the right corner of the front panel is lit with yellow colour. When the overvoltage stage operates the LED indicator turns red. Inverse time characteristic
Checking the start function Apply test voltage to terminals 13-14 or 13-15 depending on the used energizing input. Close switch S1 and increase the voltage slowly until the overvoltage stage starts and indicator L2 is lit. Read the start voltage value from the voltmeter.
16
If possible, set the test voltage at 2 x the set start voltage of the overvoltage stage. Note! The maximum voltage withstand of 2 x Un must not be exceeded. The timer is started by switch S1, when it is closed and stopped by contact 65-66, when output relay A picks up.
When the relay has been set for inverse time characteristic, the test is performed by measuring the operate time at two voltage values, e.g. 1,1 x U> and 1,4 x U> and by comparing the operate times with the operate times obtained from the characteristic curves.
Checking the undervoltage stage
Set the switches of the SGR switchgroup as follows before starting the test:
Operate time t< Definite time characteristic
Switch
Position
1 2 3 4 5 6 7 8
1 1 0 0 1 0 0 0
Set the test voltage at 0.5 times the set start voltage of the undervoltage stage. The timer is started by switch S1, when it is closed and stopped by contact 68-69, when output relay B picks up. Note! If the test voltage setting is below 0,2 x Un, switch SG1/6 must be set in position 0. Inverse time characteristic
The following relay functions are obtained: Output relay (terminals)
Function
A (65-66) B (68-69) C (80-81)
(Trip signal of stage U>) Trip signal of stage U< Signal on operation of stage U< Start signal of stage U< Self-supervision signal (Start signal of stage U>)
D (77-78) E (70-71-72) F (73-74-75)
Checking the start function Set the test voltage at a value slightly above the set start voltage U< of the undervoltage stage. Close switch S1 and lower the voltage slowly until the undervoltage stage starts and indicator L2 is lit. Read the start voltage value from the voltmeter. Checking the selfsupervision output relay (IRF)
The self-supervision system and the function of the IRF LED and the output relay E can be tested in the Trip test mode described in manual
When the relay has been set for inverse time characteristic, the test is performed by measuring the operate time at two voltage values, e.g. 0.9 x U< and 0.6 x U< and by comparing the operate times with the operate times obtained from the characteristic curves. Checking the blocking function Set switch SGB/5 of the relay module in position 1 (ON) and switch SGR/1 in position 1. Check the blocking function by applying a control voltage (voltage value within the same range as the auxiliary voltage) via switch S2 to the control input 10-11. Set the test voltage at 2 times the set start voltage of the undervoltage stage. Lower the voltage until the undervoltage stage starts and indicator L2 is lit but the undervoltage stage is not permitted to operate.
"General characteristics of C type relay modules". Operation of output relay E is indicated by L1.
17
Maintenance and repair
When used under the conditions specified in the section "Technical data", the relay requires practically no maintenance. The relay includes no parts or components that are sensitive to abnormal physical or electrical wear under normal operating conditions. If the environmental conditions on site differ from those specified, as to temperature and humidity, or if the atmosphere around the relay contains chemically active gases or dust, the relay should be visually inspected during the relay secondary testing. The visual inspection should focus on: - Signs of mechanical damage on relay case and terminals - Dust accumulated inside the relay cover or case; remove carefully with compressed air or a soft brush - Signs of corrosion on terminals, case or components inside the relay
Exchange and spare parts
Overvoltage and undervoltage relay module Combined power supply and I/O module - Uaux = 80...265 V ac/dc - Uaux = 18...80 V dc Case (including I/O module) I/O module Bus connection module
Ordering numbers
Combined overvoltage and undervoltage relay SPAU 121 C
If the relay fails in operation or if the operation values considerably differ from those stated in the relay specifications, the relay should be given a proper overhaul. Minor measures, such as exchange of a faulty module, can be taken by personnel from the customer’s instrument workshop, but major measures involving the electronics are to be taken by the manufacturer. Please contact the manufacturer or his nearest representative for further information about checking, overhaul and calibration of the relay. Note! The protection relays contain electronic circuits which are liable to serious damage due to electrostatic discharge. Before removing a module, ensure that you are at the same electrostatic potential as the equipment by touching the case. Note! Static protection relays are measuring instruments and should be handled with care and protected against damp and mechanical stress, especially during transport and storage. SPCU 1C1 SPTU 240S1 SPTU 48S1 SPTK 1E16 SPTE 1E16 SPA-ZC 17_ or SPA-ZC 21_
RS 612 002 -AA, CA, DA, FA
Combined overvoltage and undervoltage relay with test adapter RTXP 18 SPAU 121 C
RS 612 202 -AA, CA, DA, FA
The two last letters of the ordering number designate the rated frequency fn and the Uaux voltage range of the relay as follows: AA: CA: DA: FA:
fn = 50 Hz and Uaux = 80...265 V ac/dc fn = 50 Hz and Uaux = 18...80 V dc fn = 60 Hz and Uaux = 80...265 V ac/dc fn = 60 Hz and Uaux = 18...80 V dc
Order information 1. Quantity and type designation 2. Order number 3. Rated frequency 4. Auxiliary voltage 5. Accessories 6. Special requirements 18
Example of order 15 pces relay SPAU 121 C RS 612 002-AA fn = 50 Hz Uaux = 110 V dc 15 bus connection modules SPA-ZC 21 MM 2 fibre optic cables SPA-ZF MM 100 14 fibre optic cables SPA-ZF MM 5 -
The relay case is basically designed for flushmounting. The mounting depth can be reduced with an optional raising frame: type SPA-ZX 111 reduces the depth behind the mounting panel by 40 mm ,type SPA-ZX 112 reduces the
depth by 80 mm and type SPA-ZX 113 reduces the depth by 120 mm. The relay can also be mounted in a case for surface mounting, type designation SPA-ZX 115.
142
250 216 186
34
162
136
30
129 ±1
139 ±1
Dimensions and mounting
a
b
Panel cut-out
Raising frame SPA-ZX 111 SPA-ZX 112 SPA-ZX 113
a
b
176 136 96
74 114 154
Fig. 7. Dimensions of the overvoltage and undervoltage relay SPAU 121 C The relay case is made of beige anodized aluminium section. A rubber gasket fitted on the mounting collar provides an IP54 degree of protection between relay case and mounting panel, when the relay is flush mounted. The hinged cover of the relay case is made of a clear, UV stabilized polycarbonate, and provided with a sealable fastening screw. A gasket
along the edge of the cover provides an IP54 degree of protection between the case and the cover. All input and output wires are connected to the screw terminal blocks on the rear panel. Each terminal is dimensioned for one max. 6 mm2 wire or two max. 2.5 mm2 wires. The D-type connector connects to the serial communication bus.
19
SPCU 1C1 Combined overvoltage and undervoltage relay module User´s manual and Technical description
B
U > U
Un
IRF
1.2 STEP
0.8
1.6
0.5
t > [ s]
SG1
k> 0.05
1 2 3 4 5 6 7 8
1.0
0.8
U< Un
1.2
0.4
0
1
RESET
0.5
t < [ s] k< 0.1
1.0
1316
U>
U
stage, the module delivers a start signal SS1 after the set start time has expired. The start time of the U> stage is selected by means of switches SG1/1 and SG1/2, and four alternative values are available. After the preset operate time t>, or at inverse time characteristic, after a time depending on the level of the overvoltage, the overvoltage stage operates delivering a trip signal TS1. The operation characteristic of the U> stage, i.e. definite time or inverse time characteristic, is selected with switch SG1/3. At definite time characteristic the setting range of the operate time is selected with switches SG1/4. At inverse time characteristic two different sets of voltage/ time curves, called A and B, can be selected with switch SG1/4.
If the voltage measured by the module falls below the set start value of the U< stage, the module delivers a start signal SS2 after the set operate time has expired. The start time of the U< stage is selected by means of switch SG1/8, and two alternative values are available. After the preset operate time t U
U> Un
1.2 STEP
0.8
1.6
Display step push-button 0.5
Setting knob and indicator for operate time or time multiplier k> of stage U>
t > [ s]
Setting knob and indicator for starting value of stage U
0.05
1 2 3 4 5 6 7 8
1.0
0.8
1.2
0.4
0
1
Selector switchgroup SG1
Indicator for switchgroup SG1, SG2 and SG3
RESET
0.5
Setting knob and indicator for operate time or time multiplier k< of stage U
U
/Un Start value of the U> stage as a multiple of the rated voltage of the relay energizing input being used. Setting range 0.8...1.6 x Un t> [s] k>
Operate time of the U> stage, expressed in seconds, at definite time mode of operation. The required setting range, 0.05...1.00 s, 0.5...10.0 s, is selected with switch SG1/4. At IDMT mode of operation the setting range of the multiplier k> is 0.05...1.00
U
Selector switches
Operate time of the U< stage, expressed in seconds, at definite time mode of operation. The required setting range, 1...10 s, 10...100 s, is selected with switch SG1/6. At IDMT mode of operation the setting range of the multiplier k< is 0.1...1.00
The checksum of the programming switchgroup SG1 is indicated on the display when the indicator under the switchgroup is lit. In this way a check can be made to prove that the
switches have been set and that they work properly. An example of hoe the checksum is calculated is given in the description "General characteristics of C-type relay modules".
Additional relay functions required in various applications are selected with the selector switches of switchgroup SG1 located on the front panel
of the module. The numbering of the switches, 1...8, and the switch positions, 0 and 1, are marked on the front panel.
Switch
Functions to be selected
SG1/1 SG1/2
Start time for the overvoltage stage U>.
SG1/3 SG1/4
SG1/5
SG1/1
SG1/2
Start time
0 1 0 1
0 0 1 1
0.1 s 1s 10 s 60 s
Definite time or inverse time operation characteristic for the U> stage. At definite time characteristic switch SG1/4 is used for selecting the setting range of the operate time t>. At inverse time operation switch SG1/4 is used for selecting the characteristic curve set. SG1/3
SG1/4
0 0 1 1
0 1 0 1
Mode of operation
Operate time t> or characteristic curve set
Definite time Definite time Inverse time Inverse time
0.05...1.00 s 0.5...10.0 s Curve set A Curve set B
Automatic blocking of starting and tripping of the undervoltage stage U Operation indicator U> Start indicator U< Operation indicator U< Checksum ∑
0
1
Push-button
Factory set default value
1 2 4 8
0 2 0 8
15
10
Switchgroup SG3 is a so called software switchgroup, which is located in the fourth submenu of switchgroup SG1. The front panel pushSG3/1
The mode of operation can be separately set for each indicator. The mode of operation is set by means of the checksum, which can be calculated from the following table. Normally the start indications are self-reset and the operation indications manually reset. User's settings
buttons STEP and RESET can be programmed with switch SG3/1. Switches SG3/2…8 are not in use. The default value for SG3 is 0.
Clear start/trip LED's
Erase memorized values
STEP RESET STEP & RESET
x x
x
STEP RESET STEP & RESET
x x x
x
The PC board of the relay module contains a switchgroup SGB with eight switches. The switches 1...3 are used for configuring the start signals going from the module, whereas the switches 5, 7 and 8 are used for configuring the blocking signals to be routed to the under-
voltage stage in different protection relays. Switches 4 and 6 have no function in the relay module SPCU 1C1. Instructions for configuring switchgroup SGB are given in the user's manual of the different protection relays and in the signal diagram of the user's manual.
7
Measured data
The measured value is shown by the three rightmost green digits on the display. The data Indicator U
Recorded information
currently being presented on the display are indicated by LED indicators on the front panel.
Measured quantity The voltage measured by the module, expressed as a multiple of the rated voltage of the relay energizing input.
The leftmost red digit displays the register address and the other three digits the recorded information. Register/ Recorded information STEP
8
1
The highest voltage value measured during the start sequence as a multiple of the rated voltage of the relay energizing input. Any overvoltage stage start erases the old value and starts a new recording sequence. The recording sequence is stopped on operation of the overvoltage stage and the highest value during the start sequence is found in the register.
2
The highest voltage value measured as a multiple of the rated voltage of the relay energizing input. The register value is updated as soon as the measured value exceeds the value alredy in the register. Register 2 is erased with a command via the serial port or by pushing the STEP and RESET push-buttons simultaneously. The registered value is also erased on loss of auxiliary supply.
3
The lowest voltage value measured during the start sequence as a multiple of the rated voltage of the relay energizing input. Any undervoltage stage start erases the old value and starts a new recording sequence. The recording sequence is stopped on operation of the undervoltage stage and the lowest value during the start sequence is found in the register.
4
The lowest voltage value measured as a multiple of the rated voltage of the relay energizing input. The register value is updated as soon as the measured value falls below the value already in the register. Register 4 is erased with a command via the serial port or by pushing the STEP and RESET push-buttons simultaneously. The registered value is also erased on loss of auxiliary supply.
5
Number of starts of the overvoltage stage, n (U>) = 0...255.
6
Number of starts of the undervoltage stage, n (U, or, at IDMT mode of operation, of the calculated operate time. A new start resets the counter which starts recounting from zero. If the stage has tripped, the counter reading is 100.
8
Duration of the latest start event of the undervoltage stage, expressed as percentage of the set operate time t
