restrcited-sensitive earth fault protection relay - stelmec grid and power it/restrcited... ·...
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stelmecb e y o n d b o u n d a r i e s
SMA
RT G
RID & POWER IT
stelmecb e y o n d b o u n d a r i e s
In the �eld of Power System protection, Stelmec o�ers Digital Relays which are enabled with recent
technologies. Stelmec Relays provide the optimal management to the electrical network which is based
on the reliability, availability and the functionality of devices used to control & protect the network.
The SLR 140C (REF) monitors and protects the electrical networks against the restricted/sensitive
earth fault conditions.
SLR 140C REF
RESTRICTED/SENSITIVEEARTH FAULT PROTECTIONRELAY
Salient Features
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Conforms to IEC 60255 / IS 3231
Restricted/sensitive Earth Fault protection
Wide setting ranges and characteristic selection
NI, VI, EI, LTI, 3s, 1.3s, 0.6s & DTL for Earth Fault
Programmable 7 Digital I/O
Last 999 fault events with Time stamp and
Type of Fault
Self monitoring facility (watchdog)
On-line display of current
Circuit Breaker Failure Protection
Inbuilt Trip Circuit Supervision
1A or 5A CT inputs in a Relay (User/Site Selectable)
SCADA Compatibility (RS485 & USB Port)
Latched trip (86)
Self reset or hand reset selection
User-friendly settings and indications
Compact size leads to easy installation with limited space
Draw-out / Fixed type
stelmecb e y o n d b o u n d a r i e s
Restricted Earth Fault Protection
Circuit Breaker Failure Protection
2% to 100%, in steps of 1%
0.01s to 2s
64N
50BF
Protection Functions and Settings
DeviceNo. Relay Functions Settings
Rated Current (In)
Frequency
Auxiliary Power Supply
Time Multiplier
Low Set Delay
High Set Delay
CB Fail Timers
Accuracy
Contact Ratings:
Relay
Aux. Relay
Output Contacts
1A / 5A
50 / 60 Hz
85-265V AC/DC or 18-135V AC/DC
0.01 to 2.0 in steps of 0.005
0.01s to 99.99s
0.01s to 2.0s
0.01s to 2s
< ± 5%
15A @ 230V AC / 15A @ 28V DC
6A @ 230V AC / 6A @ 24V DC
The Relay provides 6 userprogrammable output relays,two with 1 NO contact andfour with 1 CO contact
Indications
Burdens for:
CT
Aux. Power
Temperature:
Operation Range
Storage Range
Ref. Standard
LED: Aux, Start, Trip & Type of Fault
LCD: User friendly display modefor control, settings andfault data
< 0.2VA@5A / < 0.1VA@1A
< 12W – operating relays activated /8W – under quiescent condition
-10˚C to +55˚C
-25˚C to +70˚C
IEC 60255 / IS 3231
Technical Speci�cations
SLR 140C REF
Monitoring Functions
Trip Circuit Supervision
CB Status Monitor
On line Neutral current Measurement
DC Healthy
••••
Dimensions
(WxHxD): 135x182x192 mm
Cutout size(WxH): 110x160 mm••
Wiring Diagram
CONNECTION DIAGRAM FOR REF/SEF
Contact:SBU: Stelmec Limited, Power IT Solution Division, Plot No. 14/15, Western Express Highway No. 8, Sativali, Vasai (E), District: Thane - 401 208.Tel. No. +91-250 6452377/6454150CORPORATE: Stelmec Limited 'Sea Queen', 43-A, H.K. Bhabha Road, Bandstand, Bandra (W), Mumbai - 400 050.Tel: +91 22 2643 6127 / 28 / 29 | Fax: +91 22 2643 6139 | E-mail: [email protected]: www.stelmec.com
• There is a continuous effort at Stelmec to keep abreast of latest technology inline with customers’ requirement.• All these activities are followed as per ISO 9001 : 2008.