Eaton 600 A 15 kV class push-OP Installation And Operation Instructions

2 OPERATION AND INSTALLATION INSTRUCTIONS MN280075EN July 2018
Form 6 microprocessor-based rack-mount recloser control
The control can be configured, by the factory or by the
user, for a wide variety of applications. If user requirements
change, the control functions can be modified to meet the
new requirements.
Theory of operation
Current sensing is provided by three current transformers
located in the recloser and interfaced to the Form 6 recloser
control via control wiring. This wiring also supplies Trip,
Close, and Recloser status, and connects to the Recloser
Interface (RIF) module to provide isolation for reliable
operation. Voltages for metering are connected to the
analog board via the connector terminal block, TB-2.
A functional block diagram of the Form 6 recloser control
is shown in Figure1. Line current flowing through the
recloser is converted by the CPU module to a digital
signal suitable for metering and fault current calculations.
Data sampling occurs at a rate of 64 times per cycle. The
CPU contains a data acquisition section that uses the
acquired samples to compute the fundamental currents
and voltage for use in overcurrent, under/overvoltage, and
under/overfrequency protection, as well as currents and
voltages for metering functions. The current for overcurrent
protection is calculated on a sub-cycle basis; it includes only
the fundamental and DC component.
TRIP SOLENOID
CLOSE SOLENOID
A Ø CT
B Ø CT
C Ø CT
OPEN / CLOSE
SWITCHES
CT COMMON
RECLOSER
POWER
28 VDC
AUXILIARY
POWER
OUTPUT
INTERCON-
NECTION
BOARD
CPU
FRONT
PANEL
RS-232
(PROVIEW
PROTOCOL
ONLY)
24, 48/125 VDC
POWER INPUT
CONNECTIONS
3 inputs
USER
CONNECTIONS
5 outputs
8 inputs
USER
CONNECTIONS
8 outputs
MATCHING
TRANSFORMERS
AND SIGNAL
CONDITIONING
ANALOG INPUT
RIF
OPTICAL
ISOLATION
OPTICAL
ISOLATION
OPTICAL
ISOLATION
OPTICAL
ISOLATION
USER
VOLTAGE
SENSING
4 inputs
I/O
ACCESSORY
RS-232
IRIG-B
COMMUNICATIONS
BOARD ACCY
•RS-485
•FIBER-OPTIC
•ETHERNET
Figure1. Form 6 rack mount recloser control operational flow diagram
When the phase or ground current exceeds its programmed
minimum-trip value and associated time-current-curve (TCC)
timing, the control initiates the programmed sequence of
recloser tripping and reclosing operations via the CPU and
RIF modules. If the fault is temporary, the control resets
to the start of its operating sequence after a preset time
delay. If the fault is permanent, the control performs its
complete programmed sequence of reclose commands
and locks out with the recloser open. Once locked out, the
control must be closed via the operator panel or SCADA
communications. This resets the control to the start of the
operating sequence.
The following chain of events occurs for an operating
sequence of two trips to lockout (one trip on TCC1,
one trip on TCC2):
1. The overcurrent signal is integrated with time on the
selected curve for the first trip operation (TCC1) to
produce the signal which energizes the trip circuit.
2. Energizing the trip circuit connects the supply to the
trip solenoid to open the recloser.
3. Upon opening, the control starts timing on the first
reclosing interval-delay time.
4. Upon expiration of this reclosing interval-delay, a closing
signal is issued from the control, closing the recloser,
and selecting the time-current characteristics for the
second trip operation (TCC2).
5. If current remains above the minimum-trip level, the
recloser will trip on TCC2 and lockout the recloser.

Eaton 600 A 15 kV class push-OP Specifications

General

Brand	Eaton
Model	600 A 15 kV class push-OP
Category	Cables and connectors
Language	English