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