SCR 2.0
19Pages

SCR2.0 Synchroscope and synch check relay User manual - Technical documentation

DOCUMENT CONTROL Version First edition Minor, chronogram completed Min/max values of SCR 2.0’s parameters added Note about functioning in High-Voltage/Low-Voltage applications Instructions about programming mode updated

PRESENTATION The unit SCR2.0 is a metering and control module used in manual synchronization and protection panels. It monitors the voltage and frequency of two power networks and shows the measured values on its 3-digit 7segment display. The 24-led circular synchroscope indicates the true instantaneous phase angle between the networks. It is powered by a battery. It can check the synchronization between a generator and its busbar, or a generator busbar and mains. The measured/calculated parameters are:  Generator phase-to-neutral voltage  Generator frequency  Busbar phase-to-neutral...

INSTALLATION The unit is designed for panel mounting, which provides user with access only to the front panel. Environmental Requirements  Operating temperature: -20°C (-4°F) to 70°C (158°F)  Storage temperature: -30°C (-22°F) to 80°C (176°F)  Maximum humidity: 95% without condensation Unpacking Make sure the packaging contains:  the unit  two clamping sets packaged apart  a delivery bill Unpack and keep the packaging in event of return. Make sure the unit does not show scratches or visible defaults. Otherwise describe them on the bill. Cut out the panel to 92x92 mm minimum (3.6 in. x...

DANGER HAZARD OF ELECTRIC SHOCK, EXPLOSION OR ARC FLASH  The unit must only be installed and serviced by qualified electrical personnel  Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices  Turn off power before installing or removing fuses, and before installing the unit  Use a properly rated voltage sensing device to confirm the power is off  Do not use renewable link fuses in fused switch Failure to follow this instruction will result in death or serious injury Note : The unit also works in High-Voltage/Low-Voltage applications where it...

LOWER CONNECTOR: digital inputs and outputs, unit power supply To check the connection, press the Lamp test button. (The led SYNCH OUT is not tested.) UPPER CONNECTOR: phase L1 and neutral on both sides of the breaker 1. 2. 3. Make sure the cable connector is NOT plugged on the upper connector Take on protective gloves Connect the wires on the cable connector in accordance with the National Wiring Regulations Term Function Technical data Description 1 GENERATOR PHASE-L1 Generator phase input, Connect the generator phase there. The generator 0-300VAC phase voltage upper and lower limits are...

HUMAN-MACHINE INTERFACE The information is displayed as follows: LED display The Synchronoscope shows the instantaneous phase difference between the generator voltage and the busbar voltage.  When both networks are synched, the uppermost led at 12:00, marked 0º, is ON  When the generator frequency is higher than the busbar frequency, the synchroscope turns clockwise  When the generator frequency is lower than the busbar frequency, the synchroscope turns counterclockwise. The Status shows the current status of the busbar and generator voltages and the synchronization checking status. The...

SCR2.0 selects VAC, Hz or Deg. depending on the position in the MENU Digital display The unit has a three-digit seven-segment display. It shows on request:  Readings (symbol, then value) in a sequence  Programmable parameters (number, then value) in a sequence Scan the various readings using the MENU button. The sequence is:  U1: busbar phase-to-neutral voltage  U2 : generator phase-to-neutral voltage  dU: voltage difference between busbar and generator phases  F1: busbar frequency  F2: generator frequency  dF: frequency difference between busbar and generator  deg: phase difference...

WARNING RISK OF UNINTENDED EQUIPMENT OPERATION Set the parameters to values that do not endanger your setup. We strongly recommend to keep the parameter #9 to 1 Failure to follow this instruction can damage equipment The program is used mainly to specify operational limits. To enter the program, press the MENU button for 5 seconds. During programming, the unit still monitors and shows the statuses. Thus, the parameters can be modified anytime, even while the generator is running. When the MENU button is pressed, the display shows the parameter number, when it is released the display shows...

Definition Hysteresis Voltage Synchronization checking delay Synchronization checking after coupling Status or description To prevent faulty decisions, you can set a hysteresis to the busbar and generator voltage limits. Recommended value: 8 V. For example, if the busbar voltage decreases, it goes out of range at P_000, whereas it returns in range at P_000 + P_007. Timer launched after the generator voltage is in range (set by parameters P_002 and P_003) and the synchronization checking is enabled. Refer to OTHER FEATURES. 0: the SYNCH CHECK relay remains energized 1: the unit continues to...

CAUTION RISK OF ERRONEOUS MEASUREMENTS Ground the engine body Failure to follow this instruction result in incorrect measurements 5.1 Power-up The unit is designed for continuous operation powered by the generator battery voltage (12/24VDC). It shuts off its displays after 1 mn if there is no voltage at the AC inputs and if no button is pressed. It starts to monitor when a voltage is applied to either generator voltage input or busbar voltage input, or any front panel button is pressed. The synchroscope illuminates if both generator and busbar phase voltages are in range. Otherwise it turns...

On 0, the synchronization checking is disabled after closing the SYNCH CHECK relay, the relay output remains energized even though the circuit breaker fails to close. Term Function mm BATTERY POSITIVE 8 9 10 BATTERY NEGATIVE DEAD BUS ENABLE SYNCHRON. (CHECK) ENABLE Description Positive terminal of the DC supply. The unit operates on both 12V and 24V battery systems. Power supply negative connection. If the signal is active, the unit is allowed to energize the relay output even though the voltage level at the busbar input is below the set limit. Refer to OTHER FEATURES. To set the limit,...