Atec Megger-Multi-Amp-EPOCH-II - Manual

EPOCH-II ®
High-Current Output Unit
■ 1000 VA of high current
■ Rugged, portable test set
■ Up to 187 Amperes maximum output
EPOCH-II
High-Current Output Unit
DESCRIPTION
The EPOCH-II ® is a high-current output unit designed to
be controlled by the PULSAR ® in combination with the
High-Current Interface Module to produce a rugged,
portable high-current, high-volt/ampere test set.
The EPOCH-II also is designed to be controlled by the
EPOCH-10
® Relay Test Set.
PULSAR/EPOCH-II or EPOCH-10/EPOCH-II combination
uses microprocessor-based, digitally synthesized sine wave
generators and solid-state regulated power amplifiers to
provide sinusoidal voltage and current outputs with
precise control of the phase-angle relationships.
These combinations will produce accurate test results even
with a fluctuating power source or when testing nonlinear
or highly saturable relays.
An optional IEEE-488 GPIB interface transforms the
EPOCH-10/EPOCH-II combination into a programmable
automatic test system when used with an external
controller or computer. Amplitude and/or phase angle can
be set to desired values, step changed, ramped, or pulsed
to new values.
APPLICATIONS
PULSAR/EPOCH-II or EPOCH-10/EPOCH-II combination is
designed to test both complex protective relays which
require phase-shifting capability and simpler relays,
including all overcurrent relays.
The table above lists the different types of relays by
device numbers, and the different combinations of a
PULSAR or EPOCH-10s and an EPOCH-II required to test
them.
FEATURES AND BENEFITS
■ Output current source has a 5-minute duty cycle rating
of 1000 volt-amperes.
■ Four output ranges at 0.01 ampere and two output
ranges at 0.1 ampere are provided.
■ Tough steel, sealed enclosure provides a high shock
and vibration resistance.
■ Completely compatible with PULSAR via the High-
Current Interface Module and the EPOCH-10 units.
Device No. Relay Types Specify
One EPOCH-II and PULSAR
with High-Current Interface
Module or one EPOCH-10
One EPOCH-II and PULSAR
with Interface Module or two
EPOCH-10s
Instantaneous Overcurrent up
to 187 A at 1000 VA
Directional Overcurrent up to
187 A at 1000 VA
All of the above plus. . .
Differential
Distance
(open-delta)
50
67
87
21
One EPOCH-II and PULSAR
with Interface Modules or
three EPOCH-10s
Distance (wye) 21
Ground Directional
Overcurrent up to 187 A at
1000 VA
67N
Overcurrent up to 187 A at 1000 VA 51