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MO - Single Phase Open StyleMC - Single Phase Closed TypeMOS- Single Phase Fusible Open Type w/ Fuseblock PremountedMTB - Single Phase Open Style (fuse block use)TPO - Three Phase Open TypeTPC - Three Phase Closed TypeAC&AS - Single Phase Auto Closed TypeMOL - Open Type With LeadsMC - Buck/Boost WiringTPOA - Three Phase Auto Open TypeTPCA - Three Phase Control AutotransformersMEC - Single Phase Epoxy Encapsulated ControlMET - Compact Solid State Electronic TransformersEPC - Euro 50/60HZ Control Multiple Tap Open TypeL.E.D TransformersEPO - Euro 50/60HZ Control Mulitiple Tap Closed Type
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Industrial Control Transformers
Industrial control transformers (also known as machine tool transformers) fill the size range from 25VA to 7500VA and up to 600volts. They are used to step-up or step-down the supply voltage for the operation of electromagnetic devices such as timers, relays, contactors or solenoid switches. A critical element in their proper usage is to supply correct voltage during short-term periods of inrush currents, providing isolation to control components from power surges and lighting circuits.
Marcus offers a broad range of control transformer options to satisfy our customer’s requirements. If the unit will be installed inside a cabinet or panel, choose our option style (MO) with standard screw terminals or with terminal block (MTB) or the finger safe encapsulated model (MTS). All open type models are available with leads upon request. For standalone installations, we have the closed type (MC) and an epoxy encapsulated model (MEC) for harsh environments. Our Buck-Boost transformer can be connected for a wide variety of voltage combinations.
Whichever model you select, you can be assured of Marcus quality. All our industrial control transformers are manufactured with bobbin-wound copper coils, incorporating high-quality insulating materials, superior grade laminations and extremely rugged solidly fixed terminals. This ensures that they operate more efficiently and are more reliable than comparable brands.
Applications of Industrial Control Transformers
Control transformers are required in circuits that require steady voltage or steady current with a low power or volt-amp rating. They are usually designed for industrial applications where electromagnetic devices such as relays and solenoids are used.
Industrial Control Transformers Catalog
Dry-Type Industrial Transformers / Industrial Control Transformers / Auto-Transformers / Line Reactors / Custom Distribution Transformers / Custom Control Transformers
MO - Single Phase Open Style
Indoor type open style / single phase [MO]
Operating Frequency: 60 Hz (50/60 Hz available on some models)
Insulation : 130 deg c: (25-1000 VA) - Class B 80 deg c Temp Rise
155 deg c: (1500-7500 VA) - Class F 100 deg c Temp Rise
Sound level: less than 40 db
Polarity: Additive
Indoor type open style / single phase [MO]
Operating Frequency: 60 Hz (50/60 Hz available on some models)
Insulation : 130 deg c: (25-1000 VA) - Class B 80 deg c Temp Rise
155 deg c: (1500-7500 VA) - Class F 100 deg c Temp Rise
Sound level: less than 40 db
Polarity: Additive
MC - Single Phase Closed Type
Indoor Type Enclosed style / single phase
Operating Frequency: 60 Hz (50Hz avaiable on some models)
Insulation: 130 deg c (50-1000 VA) - Class B 95 deg c Temp Rise
155 deg c (1500-5000 VA) - Class F 115 deg c Temp Rise
Sound Level: less than 40 db
Polarity: Additive
Indoor Type Enclosed style / single phase
Operating Frequency: 60 Hz (50Hz avaiable on some models)
Insulation: 130 deg c (50-1000 VA) - Class B 95 deg c Temp Rise
155 deg c (1500-5000 VA) - Class F 115 deg c Temp Rise
Sound Level: less than 40 db
Polarity: Additive
MOS- Single Phase Fusible Open Type w/ Fuseblock Premounted
Indoor rated open type transformer with premounted fuseblock / single phase [MOS[
Operating Frequency: 60 Hz (50/60 Hz available on some models)
Insulation : 130 deg c: (25-1000 VA) - Class B 80 deg c Temp Rise
155 deg c: (1500-7500 VA) - Class F 100 deg c Temp Rise
Sound level: less than 40 db
Polarity: Additive
Indoor rated open type transformer with premounted fuseblock / single phase [MOS[
Operating Frequency: 60 Hz (50/60 Hz available on some models)
Insulation : 130 deg c: (25-1000 VA) - Class B 80 deg c Temp Rise
155 deg c: (1500-7500 VA) - Class F 100 deg c Temp Rise
Sound level: less than 40 db
Polarity: Additive
MTB - Single Phase Open Style (fuse block use)
Open style transformer designed for use with fuse block
Operating Frequency: 60 Hz (50Hz avaiable on some models)
Insulation: 130 deg c (25-1000 VA)
80 deg c Temp Rise Class B
Sound Level: less than 40 db
Polarity: Additive
Open style transformer designed for use with fuse block
Operating Frequency: 60 Hz (50Hz avaiable on some models)
Insulation: 130 deg c (25-1000 VA)
80 deg c Temp Rise Class B
Sound Level: less than 40 db
Polarity: Additive
TPO - Three Phase Open Type
Operating Frequency: 60 Hz (50 Hz available upon request)
Insulation: Class F (155 deg c) (Type TPO 100 deg c)
Sound level: Less than 40 db
Operating Frequency: 60 Hz (50 Hz available upon request)
Insulation: Class F (155 deg c) (Type TPO 100 deg c)
Sound level: Less than 40 db
AC&AS - Single Phase Auto Closed Type
Output VA range: 0.5-20 (Series ACK), 0.5-20 (Series ASK), 0.5-7.5 (Series ACM)
Operating Frequency: 50/60 Hz (ACM), 60 Hz (Series ACK), 60 Hz (Series ASK)
Insulation: 130 deg c: Series ACK (0.5-10 KVA)
Series ASK (0.5-7.5 KVA)
Series ACM (0.5-2 KVA)
155 deg c: Series ASK (10-20 KVA)
Series ACM (3-7.5 KVA)
Series ACK (15-20 KVA)
Sound Level: :Less than 40 dB
Output VA range: 0.5-20 (Series ACK), 0.5-20 (Series ASK), 0.5-7.5 (Series ACM)
Operating Frequency: 50/60 Hz (ACM), 60 Hz (Series ACK), 60 Hz (Series ASK)
Insulation: 130 deg c: Series ACK (0.5-10 KVA)
Series ASK (0.5-7.5 KVA)
Series ACM (0.5-2 KVA)
155 deg c: Series ASK (10-20 KVA)
Series ACM (3-7.5 KVA)
Series ACK (15-20 KVA)
Sound Level: :Less than 40 dB
TPOA - Three Phase Auto Open Type
• Marcus Type TPOA three-phase auto transformers provide a quick and simple way to convert standard supply voltages to those special voltages required by small loads and fractional motors.
• These compact open-type copper transformers are Y-connected and are fitted with clearly labelled fiberglass terminal boards with solidly fixed connection studs for easy installation.
• Unlike the use of multiple unit buck-boost arrangements, there is no complicated internal wiring necessary and no conversion charts to decipher.
• As with all auto transformer installations, the loads are not isolated from the line source and caution should be exercised when there are electronics or computer controls present.
• Available in a full range of voltage combinations up to 3KVA.
• Marcus Type TPOA three-phase auto transformers provide a quick and simple way to convert standard supply voltages to those special voltages required by small loads and fractional motors.
• These compact open-type copper transformers are Y-connected and are fitted with clearly labelled fiberglass terminal boards with solidly fixed connection studs for easy installation.
• Unlike the use of multiple unit buck-boost arrangements, there is no complicated internal wiring necessary and no conversion charts to decipher.
• As with all auto transformer installations, the loads are not isolated from the line source and caution should be exercised when there are electronics or computer controls present.
• Available in a full range of voltage combinations up to 3KVA.
MC - Buck/Boost Wiring
• Buck-boost transformers are small single phase transformers designed to reduce (buck) or raise (boost) the line voltage.
• The most common example is boosting 208V to 230V for motor load operation.
• Buck/Boosts are standard single phase transformers with primary voltages of 120/240 and secondary voltages of 12/24 or 16/32.
• They are available in sizes ranging 50VA to 5kva.
Applications
• When supply voltages are consistently too high or too low, the equipment fails to operate at maximum efficiency.
• Anytime you have a lower than standard voltage, equipment failure or damage can result.
• Efficient operation of electrical equipment requires that line voltage be at or near the nameplate rating of the equipment. In order to match line voltage with equipment voltage, buck-boost transformers provide the most convenient and least expensive method.
• Do not use buck-boost transformers to solve a fluctuating voltage problem.
Buck Boost Selection Guide (3MB, PDF)• The most common example is boosting 208V to 230V for motor load operation.
• Buck/Boosts are standard single phase transformers with primary voltages of 120/240 and secondary voltages of 12/24 or 16/32.
• They are available in sizes ranging 50VA to 5kva.
Applications
• When supply voltages are consistently too high or too low, the equipment fails to operate at maximum efficiency.
• Anytime you have a lower than standard voltage, equipment failure or damage can result.
• Efficient operation of electrical equipment requires that line voltage be at or near the nameplate rating of the equipment. In order to match line voltage with equipment voltage, buck-boost transformers provide the most convenient and least expensive method.
• Do not use buck-boost transformers to solve a fluctuating voltage problem.
TPCA - Three Phase Control Autotransformers
• Three phase control autotransformers offer a fast and simple way to convert standard line voltages to those required for small loads and small motors.
• These compact, NEMA-1 enclosed autotransformers are Y-connected and come equipped with clearly labeled fiberglass terminal boards with solidly fixed terminals in order to facilitate the installation.
• Unlike connecting multiple buck-boost type transformers, there is no complicated internal wiring to carry out nor any conversion charts to decipher.
• In common with all other autotransformer installations, the loads are not isolated from the line and caution must be taken to ensure the load doesn’t contain any electronic controls or computer loads.
• Available up to 3000VA (3kVA) with a full range of line and load voltages.
• Three phase control autotransformers offer a fast and simple way to convert standard line voltages to those required for small loads and small motors.
• These compact, NEMA-1 enclosed autotransformers are Y-connected and come equipped with clearly labeled fiberglass terminal boards with solidly fixed terminals in order to facilitate the installation.
• Unlike connecting multiple buck-boost type transformers, there is no complicated internal wiring to carry out nor any conversion charts to decipher.
• In common with all other autotransformer installations, the loads are not isolated from the line and caution must be taken to ensure the load doesn’t contain any electronic controls or computer loads.
• Available up to 3000VA (3kVA) with a full range of line and load voltages.
MEC - Single Phase Epoxy Encapsulated Control
Operating Frequency: 60 Hz (50 Hz available upon request)
Insulation: 130 deg c Class B (25 VA - 750 VA)
155 deg c Class F (1000 VA - 2000 VA)
Sound Level:Less than 40 dB
Polarity: Additive
For installation in locations where exposureto the atmosphere could damage the core and coils. Elements are completely enclosed in type 3R and 12 enclosures to ensure safe and trouble-free service in damp, corrosive and suty locations. Suitable for use in refineries, mines, pulp and paper plants, mills and marine environments.
Suitable for Class 1, Division 2 locations
Operating Frequency: 60 Hz (50 Hz available upon request)
Insulation: 130 deg c Class B (25 VA - 750 VA)
155 deg c Class F (1000 VA - 2000 VA)
Sound Level:Less than 40 dB
Polarity: Additive
For installation in locations where exposureto the atmosphere could damage the core and coils. Elements are completely enclosed in type 3R and 12 enclosures to ensure safe and trouble-free service in damp, corrosive and suty locations. Suitable for use in refineries, mines, pulp and paper plants, mills and marine environments.
Suitable for Class 1, Division 2 locations
MET - Compact Solid State Electronic Transformers
Electronic Transformer for halogen lamps & L.E.D Applications
NEW DESIGN ALLOWS FOR USE WITH L.E.D LIGHTING!
**Quantity discounts available**
The MET series provides control of low voltage sources with a standard 120 volts dimmer or switch. Compatible with most incandescent and electronic type dimmers, units have complete zero to full power gradient capacity. Significant size/weight reductions open new design and flexibility.
New design allows for use with L.E.D lighting!
For use in store display counters and gas fireplace enhancement.
Fuse Protected Electronic Transformer
Model:MET-60 Input: 120V / Output: 11.5v
Operating Frequency: 60 Hz
Load: 60 Watts max. / 3 Watts min.
Size: 2.75"(60mm) x 1.44"(36mm) x 1.13"(29mm)
Thermal Cut Off Protected Transformer
Model: MET-75-1
Input: 120V / Output: 11.5v
Operating Frequency: 60 Hz
Load: 80 Watts max. / 3 Watts min.
Size: 3.56"(90mm) x 1.25"(32mm) x 0.97"(25mm)
Thermal Cut Off Protected Transformer
Model: ET-150-12-1
Input: 120V / Output: 11.5v
Operating Frequency: 60 Hz
Load: 150 Watts max. / 10 Watts min.
Size: 4.03"(103mm) x 1.41"(36mm) x 1.06"(27mm)
Electronic Transformer for halogen lamps & L.E.D Applications
NEW DESIGN ALLOWS FOR USE WITH L.E.D LIGHTING!
**Quantity discounts available**
The MET series provides control of low voltage sources with a standard 120 volts dimmer or switch. Compatible with most incandescent and electronic type dimmers, units have complete zero to full power gradient capacity. Significant size/weight reductions open new design and flexibility.
New design allows for use with L.E.D lighting!
For use in store display counters and gas fireplace enhancement.
Fuse Protected Electronic Transformer
Model:MET-60 Input: 120V / Output: 11.5v
Operating Frequency: 60 Hz
Load: 60 Watts max. / 3 Watts min.
Size: 2.75"(60mm) x 1.44"(36mm) x 1.13"(29mm)
Thermal Cut Off Protected Transformer
Model: MET-75-1
Input: 120V / Output: 11.5v
Operating Frequency: 60 Hz
Load: 80 Watts max. / 3 Watts min.
Size: 3.56"(90mm) x 1.25"(32mm) x 0.97"(25mm)
Thermal Cut Off Protected Transformer
Model: ET-150-12-1
Input: 120V / Output: 11.5v
Operating Frequency: 60 Hz
Load: 150 Watts max. / 10 Watts min.
Size: 4.03"(103mm) x 1.41"(36mm) x 1.06"(27mm)
EPC - Euro 50/60HZ Control Multiple Tap Open Type
Operating Frequency: 60 Hz (50 Hz available upon request)
Insulation: Class F (155 deg c) (Type TPO 100 deg c)
Sound level: Less than 40 db
Operating Frequency: 60 Hz (50 Hz available upon request)
Insulation: Class F (155 deg c) (Type TPO 100 deg c)
Sound level: Less than 40 db
EPO - Euro 50/60HZ Control Mulitiple Tap Closed Type
Operating Frequency: 60 Hz (50 Hz available upon request)
Insulation: Class F (155 deg c) (Type TPO 100 deg c)
Sound level: Less than 40 db
Operating Frequency: 60 Hz (50 Hz available upon request)
Insulation: Class F (155 deg c) (Type TPO 100 deg c)
Sound level: Less than 40 db
