ABB Network Partner AB
Page 1
CONNECTION AND SETTING GUIDE
Rated current of the relay, I
r
(available variants: 1 A or 5 A)
LED indicators:
In serv. (green): indicates relay in service.
Start I
α
>(yellow): indicates operation of I
α
> (no time delay).
Trip I
α
> (red): indicates operation of I
α
> after the set time delay.
I>> (red): indicates operation of I>> (no time delay).
I
α
> (Low set directional stage):
Potentiometer (P1) for setting of the operate value for the function I
α
>.
Potentiometer (P2) for setting of the inverse-time factor k or definite-time delay t for the func-
tion I
α
>.
10-pole programming switch (S1) for setting of the scale-constant Is, time-delay
characteristic, definite-time delay and characteristic angle
α
.
Potentiometer (P3) for setting of the characteristic angle
α
for the function I
α
>.
I>> (High set non-directional stage):
Potentiometer (P4) for setting of the operate value for the function I>>.
Reset push-button.
Fig. 1
Front layout
CONNECTION:
The RXPDK 21H relay requires a dc-dc converter type RXTUG for auxil-
iary voltage 24 V. Connection of voltage RL shall be made only
when the binary input is used.
The relay is delivered with a short-circuiting connector RTXK for mounting
on the rear of the terminal base. This connector will automatically short-cir-
cuit the current input when the relay is removed from its terminal base.
NOTE! The auxiliary voltage supply should be interrupted or the output cir-
cuits should be blocked to avoid the risk of unwanted alarm or tripping, be-
fore the relay is plugged into or withdrawn from its terminal base.
Fig. 2 Terminal diagram
1MRK 000 117-48
111
112
113
324
325
331
341
117
110-220V
48-60V
0V
I
α
>
I
α
>
I>>
Ur
0V
Ir
0A
114 115 116
+24V 0V -24V
121
122
123
110-220V
48-60V
0V
Bin1
Bin2
313
315
314
120
RL
316
318
317
326
328
327
Ir
RL
RXPDK 21H
Directional time-overcurrent relay
1MRK 509 024-WEN
Version 2.1
Replaces -
