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TS VOLTAGE STABILISERS
Series TS servo mechanical voltage stabilisers are the ultimate in performance and durability. They are extremely reliable voltage regulators and have a proven pedigree of engineering excellence. For a detailed explanation of the stabilising processes and the control
system see Operating Principle.
The range is exceptionally broad and almost any specification can be ordered from the comprehensive tables in our catalogue. Models range from input variations of
± 6.25% (5.5 kVA - 1104 kVA) to ± 25%
(1.35 kVA - 231 kVA) with many alternative input variations and power ratings available to order.
Customers requiring fast deliveries should contact our technical sales staff who will be pleased to advise on production lead times and current stocks of popular models.
For specification details see Technical Specifications. For direct information, catalogues, application advice and quotations please contact us, or request a 'call me'.
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Technical specifications
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Stabilised Output Voltage
Selectable 220V,230V,240V (380V/220V, 400V/230V,415V/240V)
Supplied set to 230 V (400V/230V) unless otherwise ordered, adjustable 200V to 254V (346V to 440V)
Low Voltage Models
Selectable 110V, 120V (190V/110V,208V/120V)
Supplied set to 120V (208V/120V) unless otherwise ordered, adjustable 100V to 127V (173V to 220V)
Input Voltage Range
The input voltage range (swing) is shown as percentage relative to output setting.
Each standard model provides three alternative correction ranges (Taps A, B or C).
The required tap setting should be specified when ordering. We will be pleased to advise.
kVA Ratings
The available kVA is the output phase voltage multiplied by the rated current and the
number of phases, divided by 1000.
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Standard Model Ranges
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| Suffix |
Power Range (kVA) |
Tap A |
Tap B |
Tap C |
| S |
2.7 - 552 |
-17.5% to +7.5% |
±12.5% |
-7.5% to +17.5% |
| X |
2.3 - 463 |
-21% to +9% |
±15% |
-9% to +21% |
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Alternative Wide Correction Range Models (examples)
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| Suffix |
Power Range (kVA) |
Tap A |
Tap B |
Tap C |
| S14 |
1.95 - 331 |
-24.5% to +10.5% |
±17.5% |
-10.5% to +24.5% |
| S16 |
1.72 - 289 |
-28% to +12% |
±20% |
-12% to +28% |
| S20 |
1.35 - 231 |
-35% to +15% |
±25% |
-15% to +35% |
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Alternative Narrow Correction Range Models (examples)
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| Suffix |
Power Range (kVA) |
Tap A |
Tap B |
Tap C |
| S80 |
3.45 - 690 |
-14% to +6% |
±10% |
-6% to +14% |
| S50 |
5.5 - 1104 |
-8.75% to +3.75% |
±6.25% |
-3.75% to +8.75% |
Rack Mounted Models
Rack mounted models are available in ratings from 0.46 kVA to 23 kVA
(Low voltage from 1.4 kVA to 14.4 kVA)
Supply Frequency
47-65 Hz (400 Hz or other frequencies to order)
Output Voltage Accuracy
Better than ±0.5% of set output voltage, zero to full load
Waveform Distortion
Negligible
Effect of Load Power Factor
None
Environment
Rated for indoor tropical use, -5șC to +45șC (to 60șC with derating)
Approvals
All models are CE marked and comply with appropriate directives (EMC, LVD)
Optional Extras
All Series TS voltage stabilisers can be supplied with optional extras designed to suit most application requirements. Examples include:
Metering - voltage, current, frequency
Safe Start - output voltage set to minimum at switch-on
Remote Sensing
Bypass Switch
Over and/or Under Voltage Relay
Lightning Protection
Enhanced Noise, Spike and Transient Protection
Circuit Breakers/Fuses
True RMS Sensing
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Operating Principle
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Series TS voltage stabilisers employ a motor-driven variable transformer feeding the primary winding of a buck/boost transformer, the secondary of which is connected in series between the supply and the load, so as to inject an aiding or opposing correction voltage into the supply line.
The output voltage is monitored by an electronic sensor with mean or optional true RMS sensing. Where appreciable distortion is present on the incoming supply e.g. if the supply is from a local generator set, the true RMS sensing option is recommended.
When the stabilised output voltage deviates from the set value, due to a supply voltage or load current change, the sensor energises the motor to rotate the variable transformer brushgear until the correct voltage is restored.
This method of stabilisation inherently produces no harmonics, and therefore does not add distortion to the incoming supply.
The action of the servo system is exceptionally fast with controlled deceleration resulting in zero or minimal overshoot: sensing from the output automatically compensates for any change in load current.
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