HP manual 3

AC Controls

Manual Starters and Switches

General

Table 15.1 Horsepower Ratings

	Maximum Horsepower
	AC Single Phase		DC 2-Pole Only
Voltage	1-Pole	2-Pole
115–230	1	1	3⁄4
277	1	1	—

Table 15.2	Horsepower Ratings
	Number		AC Ratings			DC Ratings
	of	Motor Type	115	230	460–575	90	115	230
Device	Poles	AC	Volts	Volts	Volts	Volts	Volts	Volts
Class	2	Single Phase	2	2	3	1	2	11⁄2
MMS	3	Three Phase	2	71⁄2	10	1	2	11⁄2
Class	2	Single Phase	2	2	3	1	2	11⁄2
MRS	3	Three Phase	2	71⁄2	10	1	2	11⁄2
Class	2	Single Phase	2	2	3	1	2	11⁄2
		3 Phase, Constant		71⁄2				11⁄2
MMS	3		2		10	1	2
		or Var. Torque
Two
Speed	3	3 Phase,	2	71⁄2	10	1	2	1
		Constant HP

15

AC Controls

Table 15.3	Manual Starters and Switches Features
Class SMF Fractional Horsepower			Class MRS and MMS Manual
Manual Starters with Melting			Switches
Alloy Type Thermal Overload Relay,
Single Unit Types
Type of	No. of		Type of	No. of
Operator	Poles	Features	Operator	Poles	Features
Basic Starter			Class MMS — Non-Reversing
Toggle	1		Toggle	1	Standard With Pilot Light (115 and 230 VAC)
	2	Standard With Red Pilot Light		2	Standard With Pilot Light (205–240 and 440–600 VAC)
Key	1		Key	1	Standard With Pilot Light (115 and 230 VAC)
	2			2	Standard With Pilot Light (208–240 and 440–600 VAC)
Starter With Handle Guard / Lock-Off						Features
Toggle	1		Type of	No. of	Suitable for	(Incl. Mechanical
			Operator	Poles	Motor Types	Interlock)
	2	Standard With Red Pilot Light	Class MMS — Reversing
	1
			Toggle	2	Single-Phase Two-	Std. With Pilot Light
	2				Winding (3-Lead)	(115 and 230 VAC)
One Starter In Duplex Enclosure					3-Phase and 1-Phase	Std. With Pilot Light
Toggle	2			3	Capacitor, Split-Phase	(110–120, 208-220,
		Standard With Red Pilot Light			4-Lead Repul.-Induct.	440–600 VAC)
Key	2
			Class MMS — Two-Speed
Two Starters In One Enclosure
Toggle	2 Each		Toggle	2	Single-Phase Two-	Std. With 2 Pilot Lights
		Standard With Red Pilot Light On Each			Winding (3-Lead)	(115 and 230 VAC)
Key	Str.				Three-Phase	Std. With 2 Pilot Lights
Starter and “Auto-Off-Hand” SPDT Selector Switch (AC Only)				3	Separate Winding	(208-220, and
Toggle	1	Standard With Red Pilot Light			(Wye-Connected)	440–600 VAC)
	2
Key	2	With Red Pilot Light
Two-Speed Starters (AC Only)
Toggle	1	With Mechanical Interlock (Standard With 2 Red Pilot Lights)
	2	With High-Off-Low Selector Switch (With 2 Red Pilot Lights)

Table 15.4 Class SMF Heater Elements

Motor Full-Load	Heater	Motor Full-Load	Heater	Motor Full-Load		Heater	Motor Full-Load		Heater
Current (Amperes)	Cat. No.	Current (Amperes)	Cat. No.	Current (Amperes)		Cat. No.	Current (Amperes)		Cat. No.
0.157–0.173	SMF H01	0.59–0.65	SMF H014	1.80	–1.99	SMF H027	5.86	–6.41	SMF H40
0.174–0.192	SMF H02	0.66–0.71	SMF H015	1.96–2.15		SMF H028	6.42–6.79		SMF H41
0.193–0.212	SMF H03	0.72–0.78	SMF H016	2.16–2.38		SMF H029	6.80–7.57		SMF H42
0.213–0.235	SMF H04	0.79–0.85	SMF H017	2.39–2.75		SMF H030	7.58	–8.15	SMF H43
0.236–0.261	SMF H05	0.86–0.96	SMF H018	2.76–2.84		SMF H031	8.16	–8.98	SMF H44
0.262–0.289	SMF H06	0.97–1.04	SMF H019	2.85–3.06		SMF H032	8.99	–9.67	SMF H45
0.290–0.321	SMF H07	1.05–1.16	SMF H020	3.07–3.45		SMF H033	9.68	–9.95	SMF H46
0.322–0.355	SMF H08	1.17–1.25	SMF H021	3.46–3.70		SMF H034	9.96	–10.8	SMF H47
0.356–0.399	SMF H09	1.30–1.39	SMF H022	3.71–4.07		SMF H035	10.9	–12.1	SMF H48
0.40–0.44	SMF H010	1.38–1.54	SMF H023	4.08–4.32		SMF H036	12.2–13.1		SMF H49
0.45–0.49	SMF H011	1.48–1.63	SMF H024	4.33–4.90		SMF H037	13.2–13.9		SMF H50
0.50–0.53	SMF H012	1.57–1.75	SMF H025	4.91–5.35		SMF H038	14.0	–15.0	SMF H51
0.54–0.58	SMF H013	1.66–1.86	SMF H026	5.36–5.85		SMF H039	15.1–16.0		SMF H52

286	Siemens Electrical Products and Systems	CSI Section 16160
	Specification Guide