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
.
P9670-2-A
1
1
1
1
013377
P
Type: P967
Type: P967
Type: P967
Type: P9670
0
0
0
Overcurrent
Overcurrent
Overcurrent
Overcurrent Relay
Relay
Relay
Relay
True R.M.S. measurements
Low Set and High Set tripping thresholds
6 selectable IDMT (Inverse Definite Minimum Time) characteristic curves
Adjustable DT (Definitive Time)
Measurement and live display of individual phase 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 input
•
OPERATION & OVERVIEW
The
P9670
P9670
P9670
P9670
(from the P9600 series family of IDMT/DT relays) is a microprocessor based relay
designed to monitor and detect Overcurrent on individual phases in a 3-phase application. Typically
the
P9670
P9670
P9670
P9670
is wired in conjunction with external current transformers of the feeder to be protected.
A clear backlit LCD provides all the key information that the user requires for both operation and the
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 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 of both internal relays for either 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 the Overcurrent 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.
A simple Summary screen is displayed once the programming is complete. The same screen can also
be displayed by subsequent 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 the 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
P9670
P9670
P9670
P9670
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
Displaying of the Summary screen during normal operation is achieved via subsequent
presses of the “RESET” button. See Section 7. 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 toroid
NETWORK
FREQUENCY
Set for 50 or 60Hz
connected toroids
RELAY 1 SETTING
Set reset mode
method
RELAY 2 SETTING
Assign relay activation and
reset mode methods
OVERCURRENT
SETTING
Set Low-set and High-set
tripping parameters
SUMMARY
1
List all parameter and
function settings
START
Display live
Phase
currents
SUMMARY
1
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
