ABB KD-10 Instruction Leaflet page 16

41-490J
Relay Range .2-4.5
T, T , T , T , T
1.23
A B B C
M, M , M
+.15
A C
1.0
S, S , S
A C
1.07
Z ohms
If the relay is tested with other settings than specified
in acceptance test use voltage levels specified here,
except double the voltage specified for S = 2 settings
and triple for S = 3 settings.
When testing KD-11 relays with other settings than
specified here, refer to correction factors listed under
Section 4.5, Distance Characteristic: KD-11,
3-phase Unit.
Use Equations (16) and (17), page 12, to estimate
test current, and allow ±5 percent tolerance as ex-
plained above.
11.2 REVERSE REACH CHECK FOR KD-11
(.2 - 4.5 OHM RANGE ONLY)
Use voltage test connection #1 and set voltages
V = 50 volts V
1F2F 2F3F
lead "23" to "terminal 15, and current lead "22" to
lead marked "21". Set phase-shifter for current to lag
V voltage by 30° this current connection is
1F2F
equivalent to phase B current lagging V
by 60° in the reverse directions. Adjust current for
3-phase unit to operate between 10.5 - 12.7 am-
peres.
Use Equations (16) and (17) to estimate test current,
and allow 5 percent tolerance as explained above.
11.3 THREE-PHASE UNIT (LOWER UNIT)
A. Use test connections #1 of Figure 25 (page 54)
and set V = V
1F2F 1F3F
The current required to close contacts of the bottom
unit should be:
Relay Range .2-4.5
Trip Current Amp 15.3-17.6
∆ Phase-Shifter
set at 90°
Nominal Maximum
Torque Angle θ
60°
m
∆ If maximum torque angle θ
m
new
16
.75-21.2 1.3-36.5
5.8 10.0
+.15 +.15
1.0 1.0
5.04 8.7
= 2 volts: connect current
voltage
BN
= 30 volts.
.75-21.2 1.3-36.6
3.3-3.38 1.90-2.16
105° 105°
75° 75°
has been changed to a new angle, the
Type KD-10 and KD-11 Compensator Distance Relay
I =
t
then test relay at the new β – angle
11.4 PHASE-TO-PHASE UNIT (TOP UNIT)
A. Use test connection #5; set V
V
fault.
Note that to set this voltage; set voltage
V 1-1F = V 2-2F , first.
Make sure that,
V = V
1 1F – 2 2F
–————–—| Example 5 |———–———
If V = 120
in
V = 30
fault
then
V = V
1 1F 2 2F
– –
trim up one of these voltages to set V
value.
The current required to close contacts of the top unit
should be:
Range
∆ Trip Current
(I ) amperes
t
Phase-Shifter
Set Current
Lagging V
1F-2F
∆ If maximum torque angle, θ
Equation (20) for trip current limits.
B. Repeat the test using test connections #6 and
#7.
11.5 MAXIMUM TORQUE ANGLE TEST
If maximum torque angle test performance is desired
follow instructions under Section13, Calibration al-
lowing ±5° tolerance. Observe the same voltage and
current limits correction as mentioned above when
relay is set for other settings than specified here. The
test currents should be modified by following multi-
plier:
θ
sin
I
t m
[Equ. 20]
-------------------
β
sin
= 30 volts =
F1F2
V V
–
in fault
[Equ. 21]
= ---------------------------- -
–
2
120 30
–
45 volts,
= --------------------- - =
2
FAULT
.2 - 4.5 .75 - 21.2 1.3 - 36.6
13.3 - 14.7 2.85 - 3.15 1.63 - 1.80
75° 75°
, has been changed to a new angle, use
m
at exact
75°