British Standard dimensioned IEC fuses for use in oil filled distribution switchgear,OEFMA

Medium Voltage Fuses and Fuse Links
British Standard dimensioned IEC fuses for use in oil filled distribution switchgear

 

OEFMA
Specifications
Decription:
BS 2692-1 medium voltage fuses for use on the primary circuit of three-phase 50Hz transformers in oil field switchgear. Fitted with powerful pyrotechnic striker pin.
Ratings:
Volts:- 3.6-24kV
Amps:- 6.3-200A
IR:- 25-50kA (See Catalog Number table
 below)
Agency Information:
Fuses comply with IEC 60282-1, BS2692-1 and ESI Standard 12-8. 7.2 and 12kV fuses tested at highest system voltage and approved by the UK Electricity Association approvals panel.
Features and Benefits:
@ Physically sized for replacement of British Standard fuse links
Typical Applications:
@ Medium Voltage BS designed equipment
Build-A-Code:
Catalog Number Build-A-Code
kV Basic Amps
Catalog Number
_ _ _ _ _ _ _ _ _ _ _
Note:
This Catalog Number selection table is based upon the following criteria:
1./Withstand against magnetizing inrush current taken as 12 times full-load current for 0.1 second.
2./Withstand against 150% permissible overload current. Recommendations marked with asterisks have the following significance:-
*Limited to permissible overloads of 130%.
**Permits use of a 12kV OHFMA 80A fuse with a 100kVA transformer where permissible overload does not exceed 130%.
3./For 6.6kV systems, 12kV fuses are recommended where possible in the interests of standardization.
4./Wherever possible, 10 inch long FO1 fuses are offered rather than equivalent 14 inch FO2 types.
5./The above recommendations are not generally applicable to transformers feeding motor circuits with starting currents in excess of the transformer full load current. In this event, please consult Cooper Bussmann.
Code Number Reference:
Type
O = Oil tight
Diameter
E = 63.5mm
H = 63.5mm
L = 63.5mm
Length
F = 254mm
G = 359mm
Striker
M = As specified in BS 2692 table 11
Tags
A = None (plain caps)
Catalog Number Voltage Descriptional Ref. BS2692: Amp Ratings Breaking Capacity (kA) Transformer Transformer Primary Voltage
OEFMA 3.6kV FO1 6.3, 10, 16, 20, 25, 31.5, 40,
50, 63, 80, 100, 125, 160, 200
50 630 3.6kV OEFMA 200
OEGMA 3.6kV FO2 100, 125, 160, 200 50    
OLGMA 3.6kV FO2 250 50 1000 3.6kV OLGMA 250*
OEFMA 7.2kV FO1 80, 100, 112 45 630 7.2kV OEFMA 100
OHGMA 7.2kV FO2 125, 140, 160 45 1250 7.2kV OHGMA 160*
OEFMA 12.0kV FO1 6.3, 10, 16, 20, 25, 31.5, 40,
50, 63
40 630 12kV OEFMA 63/—
OHFMA 12.0kV FO1 71, 80 40 750/800 12kV OHFMA 80/04
OHGMA 12.0kV FO2 6.3, 10, 16, 20, 25, 31.5, 40,
50, 63, 71, 80, 90, 100
40 1250 12kV OHGMA 100/—
OLGMA 12.0kV FO2 125 40 1600 12kV OLGMA 125*/—
OEFMA 15.5kV FO1 6.3, 10, 16, 20, 25, 31.5, 40,
50, 63
40 750/800 15.5kV OEFMA 63
OHGMA 17.5kV FO2 6.3, 10, 16, 20, 25, 31.5, 40,
50, 63, 80
35    
OLGMA 15.5kV FO2 100 40 1600 15.5kV OLGMA 100*
OEGMA 24.0kV FO2 6.3, 10, 16, 20, 25, 31.5, 40,
50
25