1MRK 509 024-WEN
Page 2
ABB Network Partner AB
Version 2.1
SETTINGS:
All settings can be changed while the relay is in normal service.
1. Setting of the scale-constant Is.
Is is common for both directional stage I
α
> and the high set stage I>>.
It is set with the programming switches S1:1, S1:2 and S1:3, from 0,1 to 1,0
×
the rated current I
r
.
2 Setting of the directional stage I
α
> operate value.
The operate value is set with potentiometer P1 according to I
α
> = P1
×
I
s
. (The directional stage operates for
I
×
cos (
ϕ
-
α
) > I
α
>)
3. The directional stage time delay.
The directional stage has six time characteristics, which are programmed on the programming switches S1:4 to S1:8.
Definite-time delay.
Set the programming switch S1:4 to position "Def time t=", where t=
Σ
+k. Switches S1:5 to S1:7 are used for the main adjust-
ment,
Σ
= 0 - 7 s, and potentiometer P2 is used for the fine adjustment k = 0,05 - 1,1 s. The minimum time delay is 50 ms and
the maximum time delay is 8,1 s.
When selecting this characteristic, the position of switch S1:8 ("RI" or "LI") has no influence.
Inverse-time delay.
Set switch S1:4 in position "Inv". The inverse-time characteristic is selected with the switches S1:5 to S1:8 (NI = Normal
Inverse, VI = Very Inverse, EI = Extremely Inverse, RI = ASEA RI-relay inverse, LI = Long-time Inverse).
By setting the selector switch S1 a precedence order is applied, from top (S1:5) to bottom (S1:8). That is, if the "NI" charac-
teristic is selected (the switch in the left hand side position), it overrides the settings of switches S1:6 to S1:8. Another exam-
ple; if the "LI" characteristic shall be used, the switches S1:5 to S1:8 must all be in the right hand side position.
After setting the time characteristic, the time-delay is determined by the time factor k, which is adjusted with potentiometer
P2 and the magnitude of the current.
4. Setting of the characteristic angle
The characteristic angle,
α
, is settable between -12° to +12°, or -120° to +120°.
Set the programming switch S1:10 for determining -
α
or
+α.
Set the programming switch S1:9 to “0,1
×α
" for the character-
istic angle 0°-12°, or “1
×α
“ for the characteristic angle 0°-120°. The angle is adjusted with potentiometer P3.
5. Setting of the non-directional stage I>> operate value.
The operate value is set with potentiometer P4 according to I>> = P4
×
I
s
.
This function can be blocked by setting potentiometer P4 to ”
∞
".
6. The binary input.
There are two binary inputs on the relay. Input 1 (terminals 111/112-113) is used for external blocking of the directional low-
set delayed stage. The directional low-set start and non-directional high-set stage will be unaffected. Input 2 (terminals 121/
122-123) is used for remote reset of the LED indicators. The functions are activated when a voltage RL is applied to the binary
inputs.
INDICATION
There are four LED indicators. The trip indicators seal-in and are reset manually by the ”Reset” pushbutton or electrically via
the binary input, while the start indicator resets automatically when the relay resets.
When the ”Reset” pushbutton is depressed during normal operating conditions, all LEDs except "In serv." will light up.
When connecting RXPDK 21H to the auxiliary voltage, the relay performs a self test. The ”In serv.” LED is alight, after per-
forming the self test and when the relay is ready for operation. In case of a fault, the LEDs will start flashing .
TRIPPING AND START OUTPUTS
The RXPDK 21H relay has one start and one delayed tripping output for the directional stage, and one tripping output for the
non-directional stage. Each output is provided with one change-over contact. All outputs reset automatically when the current
decreases to a value below the resetting value of the relay.
ESD
The relay contains electronic circuits which can be damaged if exposed to static electricity. Always avoid to touch the circuit
board when the relay cover is removed.