Dual Element Time-Delay Fuses Class Rk5 and Rk1

ECNR/ECSR/LENRK/LESRK Fuses

^SGD141.00 ECNR150

True Dual - Element Spring - Trigger Construction Allows Sizing of 125% FLA for Motor Backup Protection
Superior Overload and Cycling Capabilities
Extremely Current Limiting; Provides Superior Short Circuit Component Protection

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Description

RK5 Dual Element Time-Delay Fuses
These fuses are recommended for AC power distribution system mains, feeders and branch circuits having inductive loads (motors, transformers) or non-inductive loads (lighting, heating) where the available short-circuit current does not exceed 200,000 RMS symmetrical amperes. These "dual element, time-delay" fuses have minimum industry standard time-delay of 10 seconds at 5 times the fuse rating (8 sec. minimum for 250V, 30A and less). The timedelay characteristics of these fuses typically allows them to be sized closer to the running ampacity of inductive loads to reduce cost and provide improved overcurrent protection. These fuses will override normal equipment current surges to reduce unnecessary fuse openings. They are the most popular fuses used in the industry and the most economical for most applications, especially motors and transformers. They have moderate current limitation.

CLASS R FUSES WILL FIT CLASS H, K AND R FUSE CLIPS. CLASS R FUSE CLIPS WILL ONLY ACCEPT CLASS R FUSES. FUSES RATED 600 VOLTS AC OR LESS MAY BE APPLIED AT ANY LOWER VOLTAGE.

RK1 Dual Element Time-Delay Fuses The application recommended for these fuses is exactly the same as for the Edison ECNR/ECSR fuses except for the advantages of greater current limitation. The Edison LENRK/LESRK fuses have up to 40% more current limitation and up to 350% more Amps-Squared-Second (I2t) limitation under fault conditions than Edison ECNR/ECSR fuses to reduce potential for damage. In addition, LENRK/LESRK fuses allow better selectivity for electrical power system designers and better short circuit protection for breakers having inadequate interrupting ratings. ECNR/ECSR and LENRK/LESRK fuse lines are physically interchangeable (and electrically interchangeable per U.L. equipment listing conditions) and are recommended as a practical, economical way to upgrade systems for many situations.

SPECIFICATIONS
Voltage Rating:
    ECNR and LENRK: 250 Vac
    ECSR and LESRK: 600 Vac
Ampere Rating:
    ECNR and ECSR: 0.1 to 600 A
    LENRK and LESRK: 0.2 to 600 A
Interrupting Rating: 200,000 RMS symmetrical amps
LENRK and LESRK Self-Certified Interrupting Rating: 300,000 RMS symmetrical amps
Current Limiting:
ECNR and ECSR: RK5 fuse
LENRK and LESRK: RK1 fuse
Agency Approvals: UL Listed, Class RK5 and RK1, Guide JDDZ, File E162363; CSA Certified HRCI-R per C22.2, No. 248.12
Self-Certified DC Ratings:
    Voltage Rating: ECNR (0.1 to 600) 125 Vdc; ECSR (0.1 to 600) 300 Vdc; LENRK (0.2 to 600) 125 Vdc; LESRK (0.25 to 30) 200 Vdc; (35 to 600) 300 Vdc
Interrupting Rating:
    ECNR and ECSR: 20,000 amperes DC
    LENRK and LESRK: 20,000 amperes DC

(Specify Model Number)

Part Number/Desc.

Qty

Description

ECNR150

SGD141.00

Availability: 3 weeks

150 Amp Rating

ECNR200

SGD141.00

Availability: 3 weeks

200 Amp Rating

ECSR125

SGD219.00

Availability: 3 weeks

125 Amp Rating

ECSR150

SGD219.00

Availability: 3 weeks

150 Amp Rating

ECSR200

SGD219.00

Availability: 3 weeks

200 Amp Rating

LESRK200

SGD325.00

Availability: 3 weeks

200 Amp Rating

ECNR70

SGD62.00

Availability: 5 weeks

70 Amp Rating

ECNR80

SGD62.00

Availability: 5 weeks

80 Amp Rating

ECNR90

SGD62.00

Availability: 5 weeks

90 Amp Rating

ECNR100

SGD62.00

Availability: 5 weeks

100 Amp Rating

ECSR70

SGD119.00

Availability: 5 weeks

70 Amp Rating

ECSR80

SGD119.00

Availability: 5 weeks

80 Amp Rating

ECSR90

SGD119.00

Availability: 5 weeks

90 Amp Rating

ECSR100

SGD119.00

Availability: 5 weeks

100 Amp Rating

LESRK100

SGD176.00

Availability: 5 weeks

100 Amp Rating

ECNR1

SGD22.50

Availability: 1 week

1 Amp Rating

ECNR2

SGD20.25

Availability: 5 weeks

2 Amp Rating

ECNR3

SGD22.50

Availability: 5 weeks

3 Amp Rating

ECNR5

SGD22.50

Availability: 5 weeks

5 Amp Rating

ECNR8

SGD22.50

Availability: 5 weeks

8Amp Rating

ECNR10

SGD19.00

Availability: 1 week

10 Amp Rating

ECNR15

SGD48.50

Availability: 1 week

15 Amp Rating

ECNR20

SGD15.00

Availability: 1 week

20 Amp Rating

ECNR25

SGD15.00

Availability: 5 weeks

25 Amp Rating

ECNR30

SGD15.00

Availability: 5 weeks

30 Amp Rating

ECNR35

SGD27.50

Availability: 5 weeks

35 Amp Rating

ECNR40

SGD27.50

Availability: 5 weeks

40 Amp Rating

ECNR45

SGD27.50

Availability: 5 weeks

45 Amp Rating

ECNR50

SGD27.50

Availability: 5 weeks

50 Amp Rating

ECNR60

SGD27.50

Availability: 5 weeks

60 Amp Rating

ECSR3

SGD38.00

Availability: 5 weeks

3 Amp Rating

ECSR4

SGD38.00

Availability: 5 weeks

4 Amp Rating

ECSR5

SGD38.00

Availability: 5 weeks

5 Amp Rating

ECSR6

SGD38.00

Availability: 5 weeks

6 Amp Rating

ECSR6.25

SGD40.50

Availability: 5 weeks

6.25 Amp Rating

ECSR7

SGD40.50

Availability: 5 weeks

7 Amp Rating

ECSR8

SGD38.00

Availability: 5 weeks

8 Amp Rating

ECSR10

SGD38.00

Availability: 5 weeks

10 Amp Rating

ECSR12

SGD38.00

Availability: 5 weeks

12 Amp Rating

ECSR15

SGD34.00

Availability: 5 weeks

15 Amp Rating

ECSR17.5

SGD34.00

Availability: 5 weeks

17.5 Amp Rating

ECSR20

SGD34.00

Availability: 5 weeks

20 Amp Rating

ECSR25

SGD34.00

Availability: 5 weeks

25 Amp Rating

ECSR30

SGD34.00

Availability: 1 week

30 Amp Rating

ECSR35

SGD58.00

Availability: 5 weeks

35 Amp Rating

ECSR40

SGD58.00

Availability: 5 weeks

40 Amp Rating

ECSR45

SGD58.00

Availability: 5 weeks

45 Amp Rating

ECSR50

SGD58.00

Availability: 5 weeks

50 Amp Rating

ECSR60

SGD58.00

Availability: 1 week

60 Amp Rating

LENRK10

SGD28.00

Availability: 5 weeks

10 Amp Rating

LENRK15

SGD22.50

Availability: 5 weeks

15 Amp Rating

LENRK20

SGD22.50

Availability: 5 weeks

20 Amp Rating

LENRK30

SGD22.50

Availability: 5 weeks

30 Amp Rating

LENRK60

SGD41.50

Availability: 5 weeks

60 Amp Rating

LESRK5

SGD56.00

Availability: 5 weeks

5 Amp Rating

LESRK10

SGD56.00

Availability: 5 weeks

10 Amp Rating

LESRK15

SGD49.50

Availability: 5 weeks

15 Amp Rating

LESRK20

SGD49.50

Availability: 5 weeks

20 Amp Rating

LESRK30

SGD49.50

Availability: 5 weeks

30 Amp Rating

LESRK40

SGD85.00

Availability: 5 weeks

40 Amp Rating

LESRK50

SGD85.00

Availability: 5 weeks

50 Amp Rating

LESRK60

SGD85.00

Availability: 5 weeks

60 Amp Rating

† All prices on this site are shown in Singapore Dollars.
Note: Comes with instruction sheet.
Ordering Example: (1) ECNR1 1 amp fuse, SGD22.50 plus (1) LENRK10 10 amp fuse, SGD28.00, SGD22.50 + 28.00 = SGD50.50