Table of Contents
Advertisement
2 CALCULATION OF SETTINGS
Table 2–1: NUM_TC SETTING (SINGLE PHASE MODELS)
NUMBER OF
NUMBER
BREAKERS
OF TRIP
NUM_BKR
CIRCUITS
NUM_TC
1
1
1
2
2
1
where: TC1, TC2 = Trip Coils; T1 to T6 = ALPS Trip Outputs
Table 2–2: NUM_TC SETTING (THREE PHASE MODELS)
NUMBER OF
NUMBER
BREAKERS
OF TRIP
NUM_BKR
CIRCUITS
NUM_TC
1
1
1
2
2
1
2
2
where: TC1, TC2 = Trip Coils; T1 to T4 = ALPS Trip Outputs
107: NUM_MON - Trip Outputs To Be Monitored
Trip circuit monitoring can check the integrity of the trip circuit to which the selected trip output is connected. It does this by
sensing the voltage across the trip output as shown in Figure 2–1: TRIP CIRCUIT MONITOR. If the trip circuit is intact,
almost full DC voltage will be detected across the trip output. If the trip circuit is open for some reason, there will be no volt-
age, or very little voltage, across the trip output. The monitoring circuit will detect this condition, store an event and can be
programmed to close an alarm contact if so desired.
The trip contacts are also monitored when a trip is initiated by the ALPS. If the voltage across the contacts does not drop
when the trip is initiated, it is assumed that the trip circuit is not intact and an alarm is issued. If the voltage does drop con-
currently with the trip initiation, the trip circuit is considered to have been activated and no alarm is issued.
Any or all of the outputs (T1 to T4 for Three Phase Tripping models; T1 to T6 for Single Phase Tripping models) can be
monitored regardless of whether or not they are used in a trip circuit.
For single phase tripping models, the setting format for NUM_MON is abcdef , where any position can be a zero (0) or a one
(1) as shown below. For three phase tripping models, the setting format for NUM_MON is abcd , where any position can be
a zero (0) or a one (1) as shown in Table 2–4: SETTING FORMAT FOR NUM_MON (THREE PHASE TRIPPING MOD-
ELS). This setting is calculated in binary, but must be converted to a decimal value when entered from the keypad (see
example below).
GE Power Management
BREAKER NO. 1
TRIP CIRCUIT 1
ΦA
ΦB
ΦC
TC1-1
TC1-2
TC1-3
T1
T2
T3
T1
T2
T3
T1
T2
T3
BREAKER NO. 1
TRIP CIRCUIT 1
TRIP CIRCUIT 2
TC-1
TC-2
T1
-
T1
T2
T1
-
T1
T2
VOLTAGE
MONITOR
Figure 2–1: TRIP CIRCUIT MONITOR
ALPS Advanced Line Protection System
TRIP CIRCUIT 2
ΦA
ΦB
ΦC
TC2-1
TC2-2
TC2-3
-
-
-
T4
T5
T6
-
-
-
BREAKER NO. 2
TRIP CIRCUIT 1
TRIP CIRCUIT 2
TC-1
TC-2
-
-
T2
T3
(+) DC
TRIP OUTPUT
(FROM ALPS)
52
TC
(-) DC
2.2 GENERAL SETTINGS
BREAKER NO. 2
TRIP CIRCUIT 1
ΦA
ΦB
ΦC
TC1-1
TC1-2
TC1-3
-
-
-
-
-
-
T4
T5
T6
-
-
-
T4
2-3
2
Advertisement
Table of Contents
