Other hire & services

Line Voltage Conditioners (LVCs)
Line Voltage Conditioners (also know as power conditioners) consist 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. LVCs do a similar job to UPSs but without battery backup.

Input range -20% +10% from nominal 220 or 240V.
Output stable >5%.

They can fill in micro interruptions to the supply up to 1 cycle or 20 milliseconds. They also have very good off load to full load regulation and very fast correction to output voltage. Only operate on fixed frequency specified at purchase date. All the units we supply 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 Conditioners consist 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 and the units we supply have a sine wave output. Square or semi-sine are more common and work adequately for fridges, etc. but may damage sensitive electronics, so check your application for this before you hire or 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 drives an AC alternator to generate a different frequency and/or voltage from the input. Frequency chargers can be a little noisy but are fine for some applications, those with 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)

Load Banks
These allow you to put a controlled linear (resistive) loading onto equipment under test to prove the equipment will support the load under real conditions. They also help establish all systems are correctly calibrated for overload and other parameters. UPS and generators are systems which are tested on load banks. Load Banks are available in two types: Resistive or Reactive. Most applications use the Resistive type while others 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. The most common type in use is encapsulated type usually yellow in colour proving 110V CTE. This configuration results 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 so the neutral point is common to both input and output and 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 and 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