GE B30 Instruction Manual page 49

2 PRODUCT DESCRIPTION
2.4SPECIFICATIONS
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
The operating times include the activation time of a trip rated form-A output contact unless otherwise indicated.
FlexLogic operands of a given element are 4 ms faster. Take this into account when using FlexLogic to interconnect
with other protection or control elements of the relay, building FlexLogic equations, or interfacing with other IEDs or
NOTE
power system devices via communications or different output contacts. If not specified, the operate times given
here are for a 60 Hz system at nominal system frequency. Operate times for a 50 Hz system are 1.2 times longer.
BUS DIFFERENTIAL (87B)
Pickup level: 0.050 to 6.000 pu in steps of 0.001
Low slope: 15 to 100% in steps of 1
High slope: 50 to 100% in steps of 1
Low breakpoint: 1.00 to 30.00 pu in steps of 0.01
High breakpoint: 1.00 to 30.00 pu in steps of 0.01
High set level: 0.10 to 99.99 pu in steps of 0.01
Dropout level: 97 to 98% of pickup
Level accuracy:
0.1 to 2.0 × CT rating: ±0.5% of reading or ±1% of rated (which-
ever is greater) for six circuits or less in
the zone
>2.0 × CT rating
±1.5% of reading of the maximum circuit
current
Operating time: one power system cycle (typical)
Number of zones: 2
CT TROUBLE
Responding to: Differential current
Pickup level: 0.020 to 2.000 pu in steps of 0.001
Pickup delay: 1.0 to 60.0 sec. in steps of 0.1
PHASE/NEUTRAL/GROUND TOC
Current: Phasor or RMS
Pickup level: 0.000 to 30.000 pu in steps of 0.001
Dropout level: 97% to 98% of pickup
Level accuracy:
0.1 to 2.0 × CT:
±0.5% of reading or ±0.4% of rated
(whichever is greater)
> 2.0 × CT: ±1.5% of reading > 2.0 × CT rating
Curve shapes: IEEE Moderately/Very/Extremely
Inverse; IEC (and BS) A/B/C and Short
Inverse; GE IAC Inverse, Short/Very/
Extremely Inverse; I
(programmable); Definite Time (0.01 s
base curve)
Curve multiplier: Time Dial = 0.00 to 600.00 in steps of
0.01
Reset type: Instantaneous/Timed (per IEEE)
Curve timing accuracy
at 1.03 to 20 x pickup: ±3.5% of operate time or ±½ cycle
(whichever is greater) from pickup to
operate
Voltage restraint: modifies pickup current for voltage in the
range of 0.1<V<0.9 VT Nominal in a
fixed linear relationship
GE Multilin
PHASE/NEUTRAL/GROUND IOC
Current:
Pickup level:
Dropout level:
Level accuracy:
0.1 to 2.0 × CT rating: ±0.5% of reading or ±0.4% of rated
> 2.0 × CT rating
Overreach:
Pickup delay:
Reset delay:
Operate time:
Timer accuracy:
PHASE UNDERVOLTAGE
Pickup level:
Dropout level:
Level accuracy:
Curve shapes:
Curve multiplier:
Curve timing accuracy
at <0.90 x pickup:
Operate time:
NEUTRAL OVERVOLTAGE
2
t; FlexCurves™
Pickup level:
Dropout level:
Level accuracy:
Pickup delay:
Reset delay:
Curve timing accuracy
at >1.1 x pickup:
Operate time:
B30 Bus Differential System
2.4 SPECIFICATIONS
2.4.1 PROTECTION ELEMENTS
Phasor only
0.000 to 30.000 pu in steps of 0.001
97 to 98% of pickup
(whichever is greater)
±1.5% of reading
<2%
0.00 to 600.00 s in steps of 0.01
0.00 to 600.00 s in steps of 0.01
<16 ms at 3 × pickup at 60 Hz
(Phase/Ground IOC)
<20 ms at 3 × pickup at 60 Hz
(Neutral IOC)
±3% of operate time or ±1/4 cycle
(whichever is greater)
0.000 to 3.000 pu in steps of 0.001
102 to 103% of pickup
±0.5% of reading from 10 to 208 V
GE IAV Inverse;
Definite Time (0.1s base curve)
Time dial = 0.00 to 600.00 in steps of
0.01
±3.5% of operate time or ±1/2 cycle
(whichever is greater) from pickup to
operate
<30 ms at 0.9 pickup at 60 Hz for Defi-
nite Time mode
0.000 to 3.000 pu in steps of 0.001
97 to 98% of pickup
±0.5% of reading from 10 to 208 V
0.00 to 600.00 s in steps of 0.01 (definite
time) or user-defined curve
0.00 to 600.00 s in steps of 0.01
±3.5% of operate time or ±1 cycle
(whichever is greater) from pickup to
operate
<30 ms at 1.10 × pickup at 60 Hz
2
2-19