NR

116

11.-(3) Electrical life

Tested Sample: NR-SD-12V, 10 pcs.

Load: 54 mA 12 V DC inductive load

with diode protection

(4 relay coils in parallel of NR-SD-12V)

Frequency: 50 cps

11.-(4)Electrical life

(327 mA 24 V DC relay coil load)

Tested sample: NR-SD-24V, 5 pcs.

Condition: HP2-DC24

×6 pcs. in parallel,

diode protector provided

1,000

10,000

100

1,000

Max.

Min.

No. of operations,

100

200

300

8

4

0

12

16

Min.

Min.

Max.

Max.

x

x

No. of operations,

Pick-up voltage

Drop-out voltage

100

200

300

80

100

40

20

60

x

Min.

No. of operations,

24 V DC

NR relay contact

L1~L6: HP2-DC24V

× 6 pcs. in parallel

Diode protector provided

Max.

12. Thermal electro motive force

Tested Sample: NR-SD-12V, 5 pcs.

Coil applied V: 12 V DC

Ambient atmosphere: 25

13. High temperature test

TEST CONDITION

Tested Sample: NR-SD-24V, 30 pcs.

Ambient temperature: 80

Humidity: less than 50% R.H.

Exposure time: 2,000 hours with relays deenergized.

TEST RESULT

Contact resistance: Fig. 1

All samples were measured less than

100 m

Ω in contact resistance throughout this test.

14. Influence of adjacent mounting

15. Resistive load test

TEST CONDITION

Tested Sample: NR-SD-24V, 10 pcs.

Load: 1 A 20 V DC Resistive

Cycle rate: 1.4 cps.

Contact resistance in life test

2

4

6

8

10

12

14

16

100

200

Hour

N.C.

N.O.

10

20

40

60

80

100

100

1,000 2,000

Exposure time, hr

Max.

Max.

Min.

Distance

0

(0)

5

(.197)

10

(.394)

15

(.591)

Type

Magnetically

shielded type

±5% ±1%

0

0

Sealed type

—

±10% ±6% ±2%

No. of operations,

1

20

50

100

500

N.C.

Max.

Max.

Mean value

of N.O.

Mean value

of N.C.

Min.

Min.

N.O.

2

5

10

15

APPLICATION HINTS

Contact protection circuit

When using NR relays in inductive load circuits, a contact protection circuit is recommended.

Examples:

CR

CR

Diode

1. r = more than 20 to 30 ohms

2. In an AC circuit impedance of L is to be

somewhat smaller than impedance of r

and c.

Can be used for both AC and DC circuits.

Use 500 to 1000 ohms for r and 0.1

µF to

0.2

µF 200 V for c in a general 12 to 24 V

load circuit.

For DC circuits only.

S

Relay contact

: Inductive load

rc

L

L

r

S

c

L

S

L