Broyce Control Ltd., Pool Street, Wolverhampton, West Midlands WV2 4HN. England
Tel: +44 (0) 1902 773746 Fax: +44 (0) 1902 420639 Email: [email protected] Web: www.broycecontrol.com
The information provided in this literature is believed to be accurate (subject to change without prior notice); however, use of such information shall be entirely at the user’s own risk
.
P9680-3-A
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1
1
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012376
Type: P9680
Type: P9680
Type: P9680
Type: P9680
Combined Overcurrent and Earth Fault Relay
Combined Overcurrent and Earth Fault Relay
Combined Overcurrent and Earth Fault Relay
Combined Overcurrent and Earth Fault Relay
True R.M.S. measurements
Low Set and High Set tripping thresholds for both Overcurrent and Earth Fault detection
6 selectable IDMT (Inverse Definite Minimum Time) characteristic curves
Adjustable DT (Definitive Time)
Three phase over current and earth fault detection with live display of individual phase and earth fault currents
Last trip memory (last 10 trips stored and can be recalled)
Pre-defined selectable CT ratio’s (5:5….6000:5)
Microprocessor based (self checking) with non-volatile memory
“Ecosmart” Energy efficient power supply design
Rear mounted pluggable connectors for supply, relay contacts and current inputs
•
OPERATION & OVERVIEW
The
P9680
P9680
P9680
P9680
(from the P9600 series family of IDMT/DT relays) is a microprocessor based relay
designed to monitor and detect Overcurrent on individual phases and non-directional Earth faults (by
measurement of the neutral current) in 3-phase applications. Typically the
P9680
P9680
P9680
P9680
is wired in
conjunction with external current transformers of the feeder to be protected.
A clear backlit LCD provides all key information the user requires for both operation and setting up.
Setting is achieved in a few simple steps and requires no previous knowledge of product operation.
Normal operation provides the user with actual live individual phase currents and earth fault current
all on one screen. The actual phase current represents that of the current passing through the
primary side of the externally connected CT’s. This is achieved by the setting of the ratio for the CT.
Programming mode allows the user to assign the operation mode for both internal relays. They can
be individually assigned to Overcurrent, Earth fault or a combination of both. They can also be
configured for Auto or Manual resetting. Relay 2 has the added option of being allowed to energise
at the start or end of a time out period. If assigned to energise at the start, the Relay can be used to
operate a buzzer or lamp giving early warning before a system actually shuts down.
Low-set and High-set thresholds can be programmed for both Overcurrent and Earth fault
detection. The time current characteristic of the low-set units are selectable between Normal
Inverse curve 3/10, Normal Inverse curve 1.3/10, Long Time Inverse curve, Very Inverse curve,
Extremely Inverse curve, Extremely Inverse 0.65 curve and Definite Time. High-set units are the
Definitive Time type. Instantaneous tripping is possible by setting the time to minimum.
Two simple Summary screens are displayed once the programming is complete. The same screens
can also be displayed by presses of the
“RESET”
button. This allows the user to access key
information with the tamperproof transparent cover closed and sealed.
A Test mode is provided (also accessible with tamperproof transparent cover closed) to confirm the
correct operation of the internal relays. The relays will energise when the
“TEST”
button is pressed
and de-energise when the button is released (AUTO Reset) or when the
“RESET”
button is pressed
(MAN Reset).
Following a trip condition, the information about the trip is then stored. This can then be recalled
later if required using the
“RESET”
button to access the information. The
P9680
P9680
P9680
P9680
has the ability to
store up to 10 trips and using the “Up” and “Down” buttons, allows each trip to be displayed
individually. Each trip is also marked with a time stamp showing the time from power up as well as
the time from the previous trip. This feature is very useful for establishing a pattern on particular
inputs, knowing when they occurred and how frequent!
•
FUNCTION OVERVIEW
Programming mode.
Programmable parameters
User settings summary mode
1
Summary screens are split into two with one screen showing Overcurrent settings and the
other showing Earth fault settings.
2
Displaying of the Summary screens during normal operation is achieved via subsequent
presses of the “RESET” button. See Section 8. QUICK VIEW OF USER SETTINGS
for further information.
•
PRESENTATION
1. LCD (Liquid Crystal Display) for user information 5.
“MODE”
button*
2.
“RESET”
button 6. Parameter increment button*
3.
“TEST”
button 7. Parameter decrement button*
4.
“Power supply”
green LED indication 8.
“Trip status”
red LED indication
* accessible only when the front cover is open
START
TOROID RATIO
Set ratio of externally
connected toroids
NETWORK
FREQUENCY
Set for 50 or 60Hz
connected toroids
RELAY 1 SETTING
Assign monitoring function
and set reset mode method
RELAY 2 SETTING
Assign monitoring function,
relay activation and reset
mode methods
OVERCURRENT
SETTING
Set Low-set and High-set
tripping parameters
EARTH FAULT
CURRENT SETTING
Set Low-set and High-set
tripping parameters
SUMMARY
1
List all parameter and
function settings
START
Display live individual
phase currents and
earth fault current
SUMMARY
1 2
List all parameter and
function settings
Dims:
W x H. 96 x 96mm (front)
W x H. 89.5 x 89.5mm (main body)
L. 100mm
I
L1
0.00
A
I
L2
0.00
A
I
L3
0.00
A
I
O
0.00
A
