NTH-3 NHD Thermal Overload Relay 2.4-3A

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NTH-3 THERMAL OVERLOAD RELAY 2.4-3A

The NTH series of overload relays are suitable for use with contactors C-12 up to C-35. The NTH overload relays can also be used with other brands of contactors by using the NTH-04 seperate mounting block. This series of overload relays can replace BTH-12, BTH-18, BTH-25 and BTH-25 series of overloads.

		Motor Capacity (HP)
Thermal Overload Relay	1 Phase		3 Phase
Thermal Overload Relay	100-110V	200-220V	200-220V	380-440V	500-550V
NTH-3				1 ½	2

FULL-LOAD CURRENTS GUIDELINE
Three-Phase Squirrel Cage & Wound-Rotor Motors
HP	200V	208V	230V	460V	575V
1/2	2.5	2.4	2.2	1.1	0.9
3/4	3.7	3.5	3.2	1.6	1.3
1	4.8	4.6	4.2	2.1	1.7
1.5	6.9	6.6	6	3	2.4
2	7.8	7.5	6.8	3.4	2.7
3	11	10.6	9.6	4.8	3.9
5	17.5	16.7	15.2	7.6	6.1
7.5	25.3	24.2	22	11	9
10	32.2	30.8	28	14	11
15	48.3	46.2	42	21	17
20	62.1	59.4	54	27	22
25	78.2	74.8	68	34	27
30	92	88	80	40	32
40	120	114	104	52	41
50	150	143	130	65	52
60	177	169	154	77	62
75	221	211	192	96	77
100	285	273	248	124	99

FULL-LOAD CURRENTS GUIDELINE
Single-Phase Motors
HP	115V	200V	208V	230V
1/6	4.4	2.5	2.4	2.2
1/4	5.8	3.3	3.2	2.9
1/3	7.2	4.1	4	3.6
1/2	9.8	5.6	5.4	4.9
3/4	13.8	7.9	7.6	6.9
1	16	9.2	8.8	8
1.5	20	11.5	11	10
2	24	13.8	13.2	12
3	34	19.6	18.7	17
5	56	32.2	30.8	28
7.5	80	46	44	40
10	100	57.5	55	50

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NTH-3 NHD Thermal Overload Relay 2.4-3A

NTH-3 THERMAL OVERLOAD RELAY 2.4-3A

Motor Capacity (HP)

NTH-3

1 ½

2

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