Westinghouse TR-1 Installation, Operation & Maintenance Instructions Manual

TYPE TR·l AUXILIARY TRIPPING RELAY
CAUTION Before putting
into service, remove all blocking inserted for
the purpose of securing the parts during ship­
ment. Make sure that all moving parts opere. t e
freely. Inspect the contacts to see that they
are clean and close properly,
relay to check the
connections.
APPLICATION
The TR-1 relay is an auxiliary relay ener­
gized by protective relays to trip two circuit
breakers. Sufficient contacts are provided to
seal in both trip circuits until the breaker
auxiliary switches operate.
CONSTRUCTION
The TR-1 relay consists
switches mounted in a projection or semi-flush
SG type case. The contactor
small solenoid-type d.c. operated elements.
cylindrical plunger with a silver disc mounted
on its lower end moves
solenoid.
As the plunger travels upward,
disc bridges three silver stationary contac�.
OPERATION
The co1ls of the contactor
energized through the
protective relays. The contacts of one switch
seals in the trip circuit and
breaker. The contacts of the other switch are
for tripping a second breaker.
It is necessary to add resistance in the CSl
and CS2 coil circuits to limit the current in
these coils. This
22
external resistors,
44
trip circuit and ohms for a 250-volt
circuit. With these
SUPERSEDES I. L. 41-758
* Denot• change from supereeded iaau e .
INSTALLATION
INSTRUCTIONS
protective relays
and operate the
settings and electrical
of two contactor
switches are
A
in the core of the
the
switches are
trip contacts of the
trips one
is done with separate
ohms for a 125-volt
trip
resistance values, the
OPERATION
•
relay operating time is approximately one-half
cycle (60-cycle basis).
INSTALLATION
The relays should be mounted on switchboard
panels or their equivalent
from dirt, moisture,
heat. Mount the semi-flush type relay
cally by means of the two mounting
M ount the projection
moving and discarding
of the rear side, then secure the relay to the
panel using the mounting screw in the hardware
bag. The mounting screws may be utilized for
grounding the relay.
tiona may be made direct
means of screws for steel panel mounting or to
terminal studs furnished
ebony asbestos or slate panel mounting.
terminal studs may be easily removed or inser­
ted by locking two nuts on the studs and then
turning the proper nut with a wrench.
ADJUSTMENTS AND MAINTENANCE
The proper adjustments
operation of this relay have been made at the
factory and should not be disturbed after
ceipt by the customer.
have been changed, the
repairs, or if it is desired to check the ad­
justments at regular maintenance periods,
instructions below should be followed.
All contacts should be periodically
with a fine file.
recommended for this purpose. The use of abra­
sive material for cleaning
recommended, because
embedding small particles in the face
soft silver and thus impairing the contact.
I.L. 41-758 A
MAINTENANCE
•
in a location free
excessive vibration and
verti­
screws.
type relay by first re­
the screw in the middle
The electrical connec-
to the terminals by
with the relay for
The
to insure correct
re­
If the adjustments
relay taken apart for
the
cleaned
Style 1002110 file is
contacts is not
of the danger of
of the
EFFECTIVE JUNE 1956