Westinghouse KRD-4, Инструкция по установке, эксплуатации и обслуживанию

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'
t
Y P E K RD-4 DI R ECTIONAL OVE RCU RRENT
GROUND RELAY
41-137.30
* The spring is to be adjusted suc h that the con ­
tacts will close with
. 5
ampe res flowin g into ter­
minal
6
and out terminal
8
with terminals
7
and 9
jumped together. (Use
0. 7
Amps for
4 -1 6
and
1 0-40
Amps . )
4. De-Coupl ing Adju stment.
Conn ect high re-
sistance, low reading voltmeter acro ss terminals 4
and
5.
Pass
80
amp eres into terminals
6
and
7
and
adj ust top rig ht hand resistor (front vie w) until a mini­
mum voltage is obtained. Use care not to overheat
relay during test.
5.
Core Ad ju stment.
Apply
10
amperes to ter-
----------
terminals
8
and 9 with all other terminals open circuited,
Adj ust core such that the contacts remain open. The
core can be adjusted by the use of a screwdriver in
the slots in the bottom of the cylind er unit.
_EJ._
P I ug Adj u stment.
Apply current to terminals
8
and
9
with all other terminals open circuited . Plug
adjustment is then made p er Table
II
suc h that the
KRD-4 RELAY
TEST C IRCUIT
A
_.,. ______
PHASE
S H I FTER
A
±
PHASE
ANGLE
METER
VARIAC
spurious torques are reversed. The plugs are held in
po sition by upp er and lower plug clips . These clips
need not be disturbed in any manner when making the
neces sary adj ustment.
I ndi cati ng Contact Switch (I CS)
Adj ust the contact gap for approximately
5/64"
(- 1/64 " , +0).
Clo se the m ai n r el ay contacts and ch eck to see
that the relays pick up and the target drops betw e en
1 and
1 . 2
amperes d- e.
R E N E W A L P A R T S
Repair work can be done most satisfactorily at
the factory. How ever , interchangeable parts can be
furnished to the customers who are equipped for doing
rep air work . When ordering parts always give the com­
plete nameplate d ata.
KRD-4
RELAY
1 2 4 5 8
(l
0
f
--
9 10
0
11
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