Ashida ADR141A - Pick up and Trip Test Procedures

Doc ID : ADR241A_IM_01
Ref ID : ADR241A/IM/TC
Rev No. : 02
Page No. : 147 of 150
ADR141A /
ADR241A
11.5 Pick up and Trip Test
• Connect current source at R phase CT terminals 1A/5A current input terminal.
• Set current setting value to 100% i.e. 1A/5A, TMS at Minimum (x0.01) value.
• Start current injector to & increase current value till relay get pick up and trip. The
operating value should be within 1 to 1.1 times of set pickup value.
• Select the Curve Normal Inverse 1 and Set the TMS at 1.00.
• Connect the assigned trip contact to Timer.
• Set and apply 2 times current value and measure the timing on timer.
• The measured timing should be ±5% of actual timing (10.029 Sec).
• Repeat the above procedure for remaining phases and Earth Fault.
Phase Protection Test: -
Setting IP>: ________ IP> TMS =: _______
Threshold
Theoretical Value
Relay Value
IP> Threshold
________A
________A
IP> Drop Threshold ________A ________A
Time Delay Setting = _________
IDMT Characteristics = ________ 10 Times _________Sec. (take value from selected curve)
Threshold Relay
Time Delay at 2 times of IP> setting
________ms
________ms
Time Delay at 10 times of IP> setting
________ms
________ms
Earth Protection Test: -
Setting IE>: ________ IE> TMS = :_______
Threshold
Theoretical Value
Relay Value
IE> Threshold
________A
________A
IE> Drop Threshold ________A ________A
Time Delay Setting = _________
IDMT Characteristics = __________ 10 Times _________Sec.
Threshold Relay
Time Delay at 2 times of IE> setting
________ms
________ms
Time Delay at 10 times of IE> setting
________ms
________ms