Square D Digest 179

Timers

SE Relays 820 Modular Timers

Refer to Catalog 8501CT1104

www.se.com/us

820 Series Time Delay and Sensor Relays 820Series — SPDT, 15 A; DPDT, 15 A

Standard Part Number 821TD10HUNI 822TD10HUNI

Input Voltage Functions Available

Timing Range Contact Configuration Rated Current

SPDT DPDT

15A

10ms to10 daysSPDT

12–240 Vac/Vdc A,B,C,D,E,F,G,H,I,J

15 A (2 pairs of contacts)

820 Specifications Part Number Input Characteristics Input Voltage Range

821TD10HUNI

822TD10HUNI

12–240 Vac/Vdc

12–240 Vac/Vdc

Operating Voltage (% of Nominal) Maximum Power Consumption

85% of 12 V to 110% of 240 V

85% of 12 V to 110% of 240 V

3VA1.7W

3VA1.7W

Output Characteristics Contact Configuration Output Current Rating

SPDT

DPDT

15A

15A

Silver alloy

Silver alloy

Contact Material Switching Capability

N/A

15 A @ 240 Vac, 50/60 Hz, 24 Vdc 1/2 hp @ 120 Vac

15 A @ 240 Vac, 50/60 Hz, 24 Vdc 1/2 hp @ 120 Vac

821Relay

822Relay

Minimum Switching Requirement

1 hp @ 240 Vac Pilot duty B300

1 hp @ 240 Vac Pilot duty B300

Timing Characteristics Functions Available

Multifunction

Multifunction

Time Scales

8

8

100ms to1s 1s to10s 0.1 min to 1 min 1 min to 10 min 0.1 hr to 1 hr 1hr to10hr 0.1 day to 1 day 1 day to 10 days

100ms to1s 1s to10s 0.1 min to 1 min 1 min to 10 min 0.1 hr to 1 hr 1hr to10hr 0.1 day to 1 day 1 day to 10 days

Time Ranges

5% of mechanical setting

5% of mechanical setting

Tolerance

Repeatability at Constant Voltage and Temperature

0.2%

0.2%

Reset Time

150 ms maximum 50 ms minimum

150 ms maximum 50 ms minimum

Trigger Pulse Length

Dimensions, in. (mm)

2.6

0.7 (17.6)

(65)

0.6 (14.2)

(34.2) 1.35

(16) 0.63

(3.4) 0.13

(5) 0.2

(90) 3.5

(45.3) 1.8

1.4

20 RELAYS AND TIMERS

(35)

(16.71) 0.7

(67.5) 2.7

(7.4) 0.3

0.6 (16)

0.236 (6)

1.3 (34)

820

20-48

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