Protection Trip / Second Trip (Km1005, Ch 4, Pins 7 And 8); Circuit Breaker Close Blocking (Km1005, Ch 6, Pins 11 And 12); Under Voltage Trip (Km1005, Ch 7, Pins 13 And 14); Apx Table 1 Dip Switch Thresholds - ABB R-MAG 38kV 1250/2000A Instruction Manual

ignored. In order for the breaker to open correctly, there must be sufficient energy in the
capacitors.

3.4 Protection Trip / Second Trip (KM1005, CH 4, Pins 7 and 8)

This input can be configured as either a Protection Trip or Second Trip function. It is
programmed via Jumper JP1001 pins 1 and 2 or as a normal input by jumpering JP1001 pins 2
and 3.
The Protection Trip input is designed to work at a lower threshold of 7 VDC. This input is provid-
ed to use with special protection relay requirements. It can also be used as a normal trip input.
The Second Trip is often referred to as "Shunt Trip." It functions the same as the Remote Input
with the exception of the input impedance which is 300 kΩ.

3.5 Circuit Breaker Close Blocking (KM1005, CH 6, Pins 11 and 12)

The circuit breaker Close Blocking feature functions like the familiar 69 switch. The circuit is de-
energized when the external trip handle is moved from its normal position (i.e., to the trip
position). In this position the breaker cannot be either locally or remotely closed.
When the circuit breaker is tripped by operating the manual trip handle, the breaker will go into
the Close Block mode. This prevents any future closings until the trip handle is returned to the
normal position. The manual trip handle must be left in the down position for the switch to
remain open (i.e., locked open).
There is a padlock provision for locking the manual trip handle in the locked open position.
Note: There is a padlock provision for locking the manual trip handle in the locked open
position. (see Figure 5 Trip Handle, 38 kV)

3.6 Under Voltage Trip (KM1005, CH 7, Pins 13 and 14)

The Under Voltage Trip input will perform an auto trip in the event the voltage source being
monitored by this input falls between 35% to 70% of nominal. It is enabled through DIP Switch
I1004/2-3-4. The response of this input also has a programmable time delay from 50 millisec-
onds to 5 seconds. The delay is set by the various combinations of DIP Switch I1004/2-3-4 (see
section 9.0 DEFAULT JUMPER AND DIP SWITCH SETTINGS). The Under Voltage Threshold
is set by I1001. (see Apx Table 1 DIP Switch Thresholds
DIP SWITCH I1001 POSITION
1
2
3
NONE

Apx Table 1 DIP Switch Thresholds

THRESHOLD
100 – 127 VAC/DC
48 – 60 VDC
24 – 30 VDC
220 – 240 VAC/DC
34