ADVANCED OPERATION - Section 5
MTS-1700 SERIES OPERATION AND REFERENCE MANUAL 5-45
CU A002 15A
MANTA TEST SYSTEMS
5.15.2 Breaker Simulation 52A/52B
The 52A and 52B arrangement modes allow the [AUX CONTACT] output to simulate these signals when
used along with either an external or internal DC voltage supply. This is useful for testing many relays which
require this signal.
The 52A selection sets the [AUX CONTACT] output closed in the prefault and fault states (breaker closed),
and open in the postfault state. The 52B selection sets the [AUX CONTACT] output open in the prefault
and fault states, and closed in the postfault state (breaker open). The next figure shows typical connections
required when using the MTS-1710’s DC voltage option.
FIGURE 5.20 BREAKER SIMULATION USING AUX CONTACTS
The breaker simulator (52A or 52B) function of the auxiliary contact output can be used with the breaker
time feature. This will open (or close) the simulated breaker contacts at a programmable time after the
relay trips (i.e. in the postfault state). Both functions are programmed via the front panel menu or the RS-
232 commands. Refer to Section 5.11.1 for details on the breaker time feature.
5.15.3 Permissive & Unblock Signal Simulation
This feature allows the [AUX CONTACT_1] output to simulate a permissive or unblock signal from a
remote end when used along with either an external or internal DC voltage supply. This is useful for testing
communication-based scheme protection relays. [AUX CONTACT_2] does not support this feature.
Relay under test
52A or 52B
input
PREFAULT
FAULT
POSTFAULT
52A
52B
