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I.L. 40-385.1B
(5/92)
2-3
Current Change Fault Detectors (
∆
I
A
,
∆
I
B
,
∆
I
C
, and
∆
I
0
), no setting required.
Voltage change fault detectors (
∆
V
A
,
∆
V
B
and
∆
V
C
)
no setting required
Ground Overvoltage Unit 3V
0
(no setting required).
2.8
OPTIONAL SINGLE-POLE-TRIP LOGIC
AND OUTPUTS
• SPT/RI1 on first
φ
GF fault and 3PT on other types
of faults
• 3PT/RB if reclosing on a permanent fault
• 3PT/RB if second phase(s) fault during single
phasing
• 3PT on a selectable time delay limit if the system
fails to reclose (62T)
• TRIP/RI mode selections (TTYP):
SELECT
TRIP
RI
OFF
3PT
NO
1PR
3PT
RI2(
φ
G)
2PR
3PT
RI2(
φ
G,
φφ
)
3PR
3PT
RI2(
φ
G
,φφ
,M
φ
)
SPR
SPT (
φ
G)
RI1
3PT (M
φ
)
NO
SPR/3PR
SPT (
φ
G)
RI1
3PT (M
φ
)
RI2
Legend:
SPT - Single Pole Trip
3PT - 3 Pole Trip
RI
- Reclose Initiation
RB
- Reclose Block
RI2 - 3 Pole Reclose Initiate
RI1 - Single Pole Reclose Initiate
φ
G
- Single Phase to Ground Faults
M
φ
- Multi-Phase Faults
φφ
- 2-Phase Faults
2.9
OPTIONAL OUT-OF-STEP BLOCK
• OSB Override Timer
400-4000 ms in 16 ms steps
• OSB Inner Blinder (RT)
1.0-15.0 ohms in 0.1 ohm steps
NOTE:
The RT is a standard setting; it can be
used as a load restriction.
• OSB Outer Blinder (RU)
3.0-15.0 ohms in 0.1 ohm steps
2.10 OPTIONAL COMMUNICATION INTERFACE
• RS-232C PONI - for single point computer com-
munications
• INCOM/PONI - for local network communications
2.11 CHASSIS DIMENSIONS AND WEIGHT
Height 7" (177.8mm), 4 Rack Units (See Figure 2-8)
Width 19" (482.6mm)
Depth 14" (356mm) including terminal blocks
Weight 35 lb. (16Kg net)
2.12 ENVIRONMENTAL DATA
Ambient Temperature Range
• For Operation -20
°
C to +60
°
C
• For Storage -40
°
C to +80
°
C
Dielectric Test Voltage 2.8 kV, dc, 1 minute (ANSI
C37.90.0, IEC 255-5)
Impulse Withstand Level 5 kV peak, 1.2/50
µ
sec, 0.5
joule (IEC 255-5)
Fast Transient Surge Withstand Capability 4 kV, 5/
50 nsec (IEC 801-4); 5kV 10/150 nsec (ANSI
C37.90.1)
Oscillatory Surge Withstand Capability 2.5 kV, 1
MHz (ANSI C37.90.1, IEC 255-6)
EMI Volts/Meter Withstand 25 MHz-1GHz, 10V/m
Withstand (Proposed ANSI C37.90.2).
Summary of Contents for REL-300
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Page 135: ...I L 40 385 1B SD 6 5 92 Figure SD 2 MDAR Block Diagram sheet 1 of 1 Sub 1 1611C12...