Carrier R-410A manual Electrical Data, Standard Motors, Electrical Data, Alternate Motors

Table 4 — Electrical Data, Standard Motors

UNIT	V-PH-Hz†	VOLTAGE	FAN MOTOR		POWER SUPPLY
		LIMITS	Hp (kW)	FLA	Minimum	MOCP
					Circuit Amps
40RUA*25	208/230-3-60	187-253	5.0 (3.73)	14.6/12.8	18.3/16.0	30/25
	460-3-60	414-506	5.0 (3.73)	6.4	8.0	15
40RUS*25
	575-3-60	518-632	5.0 (3.73)	5.1	6.4	15
40RUA*28	208/230-3-60	187-253	7.5 (5.59)	21.4/19.4	26.9/24.3	45/40
	460-3-60	414-506	7.5 (5.59)	9.7	12.1	20
40RUS*28
	575-3-60	518-632	7.5 (5.59)	7.8	9.8	15
40RUA*30	208/230-3-60	187-253	10.0 (7.46)	28.2/26.8	35.3/33.5	60/60
	460-3-60	414-506	10.0 (7.46)	13.4	16.8	30
40RUS*30
	575-3-60	518-632	10.0 (7.46)	10.3	12.9	20

See Legend and Notes below.

Table 5 — Electrical Data, Alternate Motors

UNIT	V-PH-Hz†	VOLTAGE	FAN MOTOR		POWER SUPPLY
		LIMITS	Hp (kW)	FLA	Minimum	MOCP
					Circuit Amps
40RUA*25	208/230-3-60	187-253	7.5 (5.59)	21.4/19.4	26.9/24.3	45/40
	460-3-60	414-506	7.5 (5.59)	9.7	12.1	20
40RUS*25
	575-3-60	518-632	7.5 (5.59)	7.8	9.8	15
40RUA*28	208/230-3-60	187-253	10.0 (7.46)	28.2/26.8	35.3/33.5	60/60
40RUA*30	460-3-60	414-506	10.0 (7.46)	13.4	16.8	30
40RUS*28
40RUS*30	575-3-60	518-632	10.0 (7.46)	10.3	12.9	20

See Legend and Notes below.

Legend and Notes For Tables 4 and 5

LEGEND

FLA — Full Load Amps

MOCP — Maximum Overcurrent Protection

† Motors are designed for satisfactory operation within 10% of nominal

voltages shown. Voltages should not exceed the limits shown in the

Determine maximum deviation from average voltage

(AB) 397 – 393 = 4 v (BC) 403 – 397 = 6 v

(AC) 397 – 396 = 1 v

Maximum deviation is 6 v.

Determine percent voltage imbalance.

Voltage Limits column.

% Voltage Imbalance = 100 x

6

NOTES:

1.Minimum circuit amps (MCA) and MOCP values are calculated in accor- dance with NEC (National Electrical Code), Article 440.

2.Motor FLA values are established in accordance with UL (Underwriters’ Laboratories) Standard 1995.

3.Unbalanced 3-Phase Supply Voltage

Never operate a motor where a phase imbalance in supply voltage is greater than 2%. Use the following formula to determine the percentage of voltage imbalance.

max voltage deviation from average voltage

% Voltage Imbalance = 100 x

average voltage

EXAMPLE: Supply voltage is 400-3-50.

AB = 393 v

BC = 403 v

AC = 396 v

393 + 403 + 396

Average Voltage =

3

1192

=

3 = 397

397

= 1.5%

This amount of phase imbalance is satisfactory because it is below the maxi- mum allowable 2%.

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

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