Carrier 48TF004-007 specifications Electrical Data, of voltage imbalance, Voltage Imbalance

Table 2 — Electrical Data

UNIT	NOMINAL	IFM	VOLTAGE		COMPRESSOR				OFM		IFM	COMBUSTION	POWER		DISCONNECT
			RANGE			(ea)			(ea)			FAN MOTOR	SUPPLY		SIZE*
48TF	V-Ph-Hz	TYPE									FLA
			Min	Max	RLA		LRA	Qty	Hp	FLA		FLA	MCA	MOCP†	FLA	LRA
	208/230-1-60	Std	187	254	16.2		96.0	1	1/	1.4	3.5	.6	24.5/24.5	30/30	23/23	106/106
		Alt							4		4.9		26.6/26.6	35/35	26/26	111/111
		Std									3.5		17.7/17.7	25/25	17/17	85/85
	208/230-3-60	Alt	187	254	10.2		75.0	1	1/	1.4	4.9	.6	19.1/19.1	25/25	19/19	90/90
									4
		High									5.2		19.4/19.4	25/25	19/19	109/109
004		Std									1.3		7.6	15	7	48/48
	460-3-60	Alt	414	508	4.4		40.0	1	1/	0.8	2.1	.3	8.4	15	8	48/48
									4
		High									2.6		8.9	15	9	57/57
		Std									1.3		6.3	15	7	35
	575-3-60	Alt	518	632	3.7		31.0	1	1/	0.8	2.1	.3	6.9	15	8	37
									4
		High									2.6		7.3	15	7	45
	208/230-1-60	Std	187	254	23.3		118.0	1	1/	1.4	3.5	.6	34.0/34.0	40/40	32/32	129/129
		Alt							4		4.9		35.4/35.4	45/45	34/34	133/133
		Std									3.5		24.2/24.2	30/30	23/23	101/101
	208/230-3-60	Alt	187	254	15.4		90.0	1	1/	1.4	4.9	.6	25.6/25.6	30/30	25/25	105/105
									4
		High									5.2		25.9/25.9	30/30	25/25	124/124
005		Std									1.8		13.0	20	13	51
	460-3-60	Alt	414	508	8.3		45.0	1	1/	0.8	2.1	.3	13.3	20	13	53
									4
		High									2.6		13.8	20	13	62
		Std									1.8		10.1	15	10	41
	575-3-60	Alt	518	632	6.4		36.0	1	1/	0.8	2.1	.3	10.3	15	11	42
									4
		High									2.6		10.7	15	10	50
	208/230-1-60	Std	187	254	28.8		147	1	1/	1.4	5.9	.6	43.3/43.3	60/60	42/42	161/161
		Alt							4		6.6		44.0/44.0	60/60	42/42	184/184
		Std									5.9		27.3/27.3	35/35	29/29	128/128
	208/230-3-60	Alt	187	254	16.3		114	1	1/	1.4	5.2	.6	26.6/26.6	35/35	26/26	148/148
									4
		High									7.5		28.9/28.9	35/35	29/29	174/174
006		Std									3.1		13.2	20	13	72
	460-3-60	Alt	414	508	7.4		64	1	1/	0.8	2.6	.3	12.7	15	12	81
									4
		High									3.4		13.5	20	13	94
		Std									3.1		10.9	15	11	58
	575-3-60	Alt	518	632	6.2		62	1	1/	0.8	3.0	.3	10.5	15	10	66
									4
		High									3.4		12.6	15	11	76
	208/230-3-60	Std	187	254	23.6		146	1	1/	1.4	5.2	.6	30.2/30.2	35/35	29/29	180/180
		High							4		7.5		32.5/32.5	40/40	32/32	205/205
007	460-3-60	Std	414	508	10.6		73	1	1/	0.6	2.6	.3	15.4	20	15	90
		High							4		3.4		16.1	20	16	103
	575-3-60	Std	518	632	8.5		58.4	1	1/	0.6	2.6	.3	12.3	15	13	72
		High							4		3.4		12.9	20	14	82

		LEGEND
FLA	—	Full Load Amps
HACR —		Heating, Air Conditioning and Refrigeration
IFM	—	Indoor (Evaporator) Fan Motor
LRA	—	Locked Rotor Amps
MCA	—	Minimum Circuit Amps
MOCP —		Maximum Overcurrent Protection
NEC	—	National Electrical Code
OFM	—	Outdoor (Condenser) Fan Motor
RLA	—	Rated Load Amps

*Used to determine minimum disconnect per NEC. †Fuse or HACR circuit breaker.

NOTES:

1. In compliance with NEC requirements for multimotor and combination

load equipment (refer to NEC Articles 430 and 440), the overcurrent

protective device for the unit shall be fuse or HACR breaker. Canadian

units may be fuse or circuit breaker.

Example: Supply voltage is 460-3-60.

AB = 452 v BC = 464 v AC = 455 v

452 + 464 + 455

Average Voltage =

3

=1371

3

=457

Determine maximum deviation from average voltage. (AB) 457 – 452 = 5 v

(BC) 464 – 457 = 7 v (AC) 457 – 455 = 2 v

Maximum deviation is 7 v.

Determine percent of voltage imbalance.

2. Unbalanced 3-Phase Supply Voltage

% Voltage Imbalance = 100 x

7

Never operate a motor where a phase imbalance in supply voltage is

greater than 2%. Use the following formula to determine the percent

of voltage imbalance.

% Voltage Imbalance

max voltage deviation from average voltage

= 100 x

average voltage

457

= 1.53%

This amount of phase imbalance is satisfactory as it is below the max- imum allowable 2%.

IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact your local electric utility company immediately.

10