CT is required for current detection (150 series only).

Please refer to the page for each series for compatible current transformers.

Normally, you can select based on the motor capacity, but if you have a special capacity or a different motor voltage (standard Shock Relay can be used up to a maximum of 600V), select based on the motor's rated current value (current setting range).

The operating power supply voltages listed in the table are standard. For operating power supply voltages other than the standard, the 150 series is a special product that can accommodate different voltages.

There are two modes for the output relay operation: operation upon detection and reset upon detection.

Please note that if the operating power is suddenly cut off during operation due to a power outage or other reason, the output relay may operate.

1) Operation type when detected

The output relay operates (contacts reverse) only when an overcurrent is detected.

2) Reset type when detected

When Shock Relay 's operating power is turned on, the output relay operates (the contacts are reversed). Then, the output relay that was operating when an overcurrent was detected returns to its original state.

There are two modes for output relay recovery: self-holding and Auto reset.

1) Self-holding type

In this mode, the output relay will remain in operation even after the overcurrent has disappeared. To restore operation, press the reset button or turn off the power supply.

2) Auto reset type

After operating due to an overcurrent, the output relay will automatically return to normal operation when the overcurrent is removed.

3) Self-holding type/ Auto reset type

You can switch between the two modes above.

• 1) Detection accuracy will be reduced, but generally speaking, there will be no practical problems if the range is between 30 and 60 Hz.
• 2) Even in the 30 to 60 Hz range, when accelerating or decelerating with an inverter, the current may increase or decrease, causing Shock Relay to operate.
  Accelerate and decelerate slowly or set the load current within the allowable range.
• 3) Connect the CT to the secondary side of the inverter. However, be sure to connect Shock Relay operating power supply to a commercial power source (not the secondary side of the inverter).

If the device has a large inertia or a large reduction ratio from the motor, it may not be able to protect the device, so please perform a prototype test before use.

The factory settings are: Start time/Shock time: min, Current: max.