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SOLUTIONS / ENGINEERED SYSTEMS / ELECTRICAL TECHNICAL DATA

Design & Engineering support for modern electro-mechanical systems.

Hydrotech isn't just a distributor of quality industrial parts. We staff a full engineering department with experienced experts ready to design, assemble and integrate full system solutions.

Design & Engineering support for modern electro-mechanical systems.

Hydrotech isn't just a distributor of quality industrial parts, We staff a full engineering department with experienced experts ready to design, assemble and integrate full system solutions.

Electrical Technical Data

Hydraulic systems

Electrical Units

Common electrical units used in formulas and equations are:

  • Volt - unit of electrical potential or motive force - potential is required to send one ampere of current through one ohm of resistance
  • Ohm - unit of resistance - one ohm is the resistance offered to the passage of one ampere when impelled by one volt
  • Ampere - units of current - one ampere is the current which one volt can send through a resistance of one ohm
  • Watt  - unit of electrical energy or power - one watt is the product of one ampere and one volt - one ampere of current flowing under the force of one volt gives one watt of energy
  • Volt Ampere  - product of volts and amperes as shown by a voltmeter and ammeter - in direct current systems the volt ampere is the same as watts or the energy delivered - in alternating current systems - the volts and amperes may or may not be 100% synchronous - when synchronous the volt amperes equals the watts on a wattmeter - when not synchronous volt amperes exceed watts - reactive power
  • Kilovolt Ampere  - one kilovolt ampere - KVA - is equal to 1,000 volt amperes
  • Power Factor - ratio of watts to volt amperes

Electrical Formulas

Electric Power Formulas

P = V I         (1a)

P = R I2         (1b)

P = V2/ R         (1c)

where

P = power (Watts)

V = voltage (Volts)

I = current (Amperes)

R = resistance (Ohms)

Electrical Potential Formulas - Ohms Law

Ohms law can be expressed as:

V = R I         (4a)

V = P / I         (4b)

V = (P R)1/2         (4c)

Example - Ohm's law

A 12 volt battery supplies power to a resistance of 18 ohms.

I = (12 Volts) / (18 ohms)

= 0.67 Ampere

Electric Current Formulas

I = V / R         (2a)

I = P / V         (2b)

I = (P / R)1/2         (2c)

Electric Resistance Formulas

R = V / I         (3a)

R = V2/ P         (3b)

R = P / I2         (3c)

Electrical Motor Formulas

Electrical Motor Efficiency

μ = 746 Php / Pinput_w         (5)

where

μ = efficiency

Php = output horsepower (hp)

Pinput_w = input electrical power (Watts)

or alternatively

μ = 746 Php / (1.732 V I PF)         (5b)

Electrical Motor - Power

P3-phase = (V I PF 1.732) / 1,000         (6)

where

P3-phase = electrical power 3-phase motor (kW)

PF = power factor electrical motor

Electrical Motor - Amps

I3-phase = (746 Php) / (1.732 V μ PF)         (7)

where

I3-phase = electrical current 3-phase motor (Amps)

PF = power factor electrical motor

OUR PURPOSE

Industry in Motion

American industry has never enjoyed more opportunity than it does today – or faced more challenges. Hydrotech is here to help you compete, evolve, lead and win with superior solutions in fluid power, automation, service & repair and connected technologies.

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