GE Multilin 350, Operation & Maintenance Manual

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4
BE1-27, 59, 27/59
SPECIFICATIONS, continued
indicator is illuminated and the corresponding time delay
circuit is initiated. If the adverse voltage condition is
present at the end of the programmed time delay, the
appropriate output relay is energized and, if present, the
associated target indicator is enabled.
TIMING
Timed functions are available with instantaneous, definite,
short inverse, medium inverse, or long inverse timing
characteristics. Timing characteristics are individually
selectable for undervoltage and overvoltage functions.
Definite time is adjustable from 0.0 to 9.9 seconds in 0.1
second increments and accurate within 5% or 50 millisec-
onds (whichever is greater) of the setting. Inverse time is
adjustable from 00 to 99 in increments of 01. The setting
defines a curve as illustrated in Figure 2. Inverse timing is
accurate within 5% of the time described by the curve. A
setting of 00 will produce an instantaneous response on
either definite or inverse timing.
INSTANTANEOUS FUNCTIONS
Instantaneous undervoltage and overvoltage functions are
available to provide immediate response to extremely
adverse voltage conditions.
When the system voltage is greater than the instantaneous
overvoltage setting or less than the instantaneous
undervoltage setting, the appropriate output relay is
energized and, if present, the associated target indicator is
enabled. This occurs in less than 50 milliseconds when the
instantaneous pickup setting is exceeded by 1 volt or 5%,
whichever is greater.
POWER SUPPLY STATUS OUTPUT
The power supply output relay is energized and its NC
output contact is opened when power is applied to the
relay. Normal internal relay operating voltage maintains the
power supply status output relay in a continuously
energized state with its output contact open. If the power
supply output voltage falls below the requirements of
proper operation, the power supply output relay is de-
energized, closing the NC output contact.
TARGETS
An electronically latched target indicator indicates that the
trip output has energized. Either an internally operated or
current operated target may be specified. Current oper-
ated targets require 0.2A in the output trip circuit to
actuate, and trip circuit current must not exceed 30A for
0.2 seconds, 7A for 2 minutes, and 3A continuous. Current
operated targets may be selected only when normally
open (NO) output contacts have been specified.
OUTPUTS
Output contacts are rated as follows:
Resistive
120/240 Vac - make, break, and carry 7A continuously.
250 Vdc - make and carry 30A for 0.2 seconds, carry
7A continuously, break 0.1A.
500 Vdc - make and carry 15A for 0.2 seconds, carry
7A continuously, break 0.3A.
Inductive
120 Vac, 125 Vdc, 250 Vdc - break 0.1A (L/R = 0.04).
Push-to-Energize Output Pushbuttons
Applying a thin non-conducting rod through a hole in the
front panel energizes each output relay for testing the
external trip circuits.
SURGE WITHSTAND CAPABILITY
Qualified to IEEE C39.90.1-1989, Surge Withstand Capa-
bility Test and IEC 255, Impulse Test and Dielectric Test.
MECHANICAL
Operating Temperature
-40°C (-40°F) to 70°C (158°F).
Storage Temperature
-65°C (-85°F) to 100°C (212°F)
Weight
14 pounds (6.35 kg)
Shock
In standard tests, the relay has withstood 15g in each of
three mutually perpendicular axes without structural
damage or degradation of performance.
Vibration
In standard tests, the relay has withstood 2g in each of
three mutually perpendicular axes swept over the range of
10 to 500 Hz for a total of six sweeps, 15 minutes for each
sweep, without structural damage or degradation of
performance.