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Line Voltage Conditioner
Line Voltage Conditioner (also know as power conditioner) consists of a self regulating isolation transformer c/w tuning capacitors on output winding. Units provide high quality sine wave output even from distorted input waveforms. LVC does a similar job to UPS but without battery back up.Input range -20% +10% from nominal 220 or 240V. Output stable >5%. It can fill in micro interruptions to the supply up to 1 cycle or 20 milliseconds. Has very good off load to full load regulation, very fast correction to output voltage.Only operates on fixed frequency specified at purchase date, all of ours are 50Hz but 60 Hz are available. Heavier and acoustically noisier than electronic versions see below.

Line Voltage Conditioners ~ PASSIVE

CETRONICS REGUVOLT:  
Input 192-264V 50Hz Output 240/240V.Stability 1%
(1kVA) (3kVA) (4kVA)
(5kVA) (7.5kVA) (10kVA)
GALATREK 3000VA:
Input 200-264V 50Hz. Output 240V.Stability 3%
(3kVA)

Line Voltage Conditioners ~ ELECTRONIC

Electronic Line Voltage Conditioner again consists of an isolation transformer c/w triac regulated control on output which switches in and out different tapps on the transformer as current passes through zero point of cycle. Input range -20% +10% from nominal 220 or 240. Output stable 5%. Lighter and much quieter than passive version see above. Operates on 50 or 60 Hz.

CETRONICS EMPC: Input 192-264V  
50/60Hz Output 240V Stability 5%
(5kVA).(7.5kVA)

Inverters: 

Inverters turn DC into regulated AC. Various types are available, ours have a sine wave output ,square or semi sine are more common and will work just fine for fridges etc but may damage sensitive electronics so check your application for this before hire/buy. In some UPS systems the DC to AC section can be used as an Inverter.

Input 24V DC. Output 240V 50Hz  
(1kVA)
Input 48V DC. Output 240V 50Hz
(3kVA)

Frequency Changers ~ ROTARY

The incoming AC powers an electric motor which through a mechanical or toothed belt link drives an AC alternator to generate a different frequency and or voltage from the input. Can be a bit noisy but ok for some applications,except for.Monobloc construction, single shaft type very quiet and high quality, designed to run computers and other sensitive equipment

Input 3PH 380-415V 50Hz.  
Output 110-120V 60Hz(6kVA)
Input 3PH 380-415V 50Hz.
Output 3 PH 208V 60Hz
(20kVA)(40kVA)(60kVA)(100kVA)

Frequency Changers ~ STATIC

The incoming AC powers an electric motor which through a mechanical or toothed belt link drives an AC alternator to generate a different frequency and or voltage from the input. Can be a bit noisy but ok for some applications,except for.Monobloc construction, single shaft type very quiet and high quality, designed to run computers and other sensitive equipment

Input 120/220/240V 50Hz.  
Output 120/220/240V 60Hz
(1.2kVA)(2.4kVA)

Load Banks

A load bank is a device which enables you to put a controlled linear (resistive) loading onto equipment under test in order to prove the equipment will support the load under real conditions and also to prove all systems are correctly calibrated for overload and other parameters. UPS and generators are systems which are tested on load banks. Available in two types most common are Resistive or some applications require Reactive.Resistive banks are usually made from precision heater elements and have a power factor of 1, Reactive banks have additional capacitors and coils which can be introduced to provide high crest factor or

40kVA 
20kVA 
240 KW ROAD TOW 

Transformers ~ DOUBLE WOUND

Transformers with two separate windings,no connection from primary to secondary windings, can be used to create separate supply for sensitive or critical electronics. most common type in use is encapsulated type usually yellow in colour proving 110V CTE. This configuration resulting in a supply of 55V-0-55V where 0 is common with ground, by limiting the voltage available between any 1 conductor and earth this design limits the possibility of a fatal electric shock, isolation transformers are mandatory on construction sites

Input 3PH 380/400/415V 50/60Hz.  
Output 3PH 190/200/208V 50/60Hz.
(110kVA)(90kVA)(75kVA)(22kVA)
Input 220/240V 50/60Hz.
Output 110/120V 50/60Hz.
(1kVA)(1.5kVA)(2kVA)(7.5kVA)(10kVA)(15kVA)(26kVA)(30kVA)
Input 3PH 415V Delta
Output 3PH 415V Star
15kVA

Transformers ~ AUTO WOUND

Transformers with only one winding. Therefore the neutral point is common to both input and output. Does not isolate the load from the supply

Input/Output380/400/415/190/200/208V 50/60Hz  
(36kVA)(12kVA)
Input/Output 220/230/240/100/110/115/120V 50/60Hz
(30kVA)(2kVA)(3kVA)

Variacs

Variac is a contiuously variable auto transformer available in single or three phase. With a variac you can start at any voltage including 0 Volts and gradually increase the supply voltage to equipment under test until it reaches the test point or maximum required. Very useful for repairing power supplies or providing non standard voltages for a variety of equipment. Most test labs have at least one. One point to note the wiper connection should always be fused as if the variac is misused it will very quickly burn out the windings.

The large variacs are oil immersed they are very heavy

Input 415V 50/60Hz 
Output 0-476V continuously variable 
25A and smaller 
42A and larger 
Input 240V 50/60Hz 
Output 0-264V continuously variable 
8A 
20A 
125A