Miniverter 4

General
The Miniverter 230 V mains input must be protected by a fuse or circuit breaker of 6 A for 500 VA or 10 A for 800 VA and 13 A for 1100 VA, ‘Klippon’ type terminal blocks are used for cable termination in the power management and bypass module, fuses and circuit breakers should sized to accept inrush current ‘slow’ characteristic. Maintenance free recombination monobloc batteries are supplied as optional items and the recharge float voltage is set at 54.48 V DC (nominal 48 V DC), the minimum autonomy battery is supplied within the bypass module.

Options

• Psophometric filtering to meet CCITT requirements.
• RFI suppression filters.
• Interconnecting plugs and sockets between UPS module and bypass module.
• Battery module with maintenance free lead acid or NiCad batteries to give autonomy up to 8 hours.
• External station battery connection facilities with blocking diode and protection.
• CEGB approval options pack for NGC, National Power, Powergen, Scottish Nuclear and Nuclear Electric.
• Miniverter 2, special seismic qualified construction with external station battery connection for Nuclear power stations and military applications with integral automatic bypass.
• Miniverter CCITT special inverter available for connection to Telecoms 48 V DC station battery.

Typical Scheme

Dimensions

The Miniverter 4 series of rugged, industrial class of Uninterruptible Power Supply Systems are designed to provide high security power for process engineering, data logging, military, instrumentation, public utility and telecoms applications.

Miniverters are active-on-line UPS Systems which provide galvanic separation between mains and DC and between the critical load and the mains. A full capacity rectifier provides continuous power for the inverter and simultaneously charges the battery module. This series of rack mounting UPS Systems are of a modular construction with rectifier, inverter, bypass and battery available as separated items. Metering, status indication with remote signalling features and distribution modules are available as popular options with this product.

The inverter is a PWM - Pulse Width Modulation type using the latest in high frequency transistor switching technology producing a precisely regulated AC Sine Wave output with an exceptional performance to handle switch mode and other non-linear loads.

In the event of commercial mains failure, the inverter draws its power from the battery module or the station battery and will continue to supply the critical load without any disturbance until the battery low level is reached or when power has been restored to the rectifier.

Where abnormal overload conditions or over temperature conditions impact the continued operation of the inverter the automatic bypass switch will operate. The bypass switch module enables the critical load to be transferred to the bypass circuit automatically, then returns the load back to the inverter without disturbing the critical load security. A manual maintenance bypass is also provided.

Rectifier	Input Voltage, Single phase & Neutral	110/220/230/240 V (+/- 15%)*
	Input Frequency	50 (60 Hz) +/- 5%
	Power Factor (mean value)	0.8
	Battery Charging characteristic	IU (DIN 41773)
	Input Transformer	Double wound isolation with galvanic separation
Inverter	Input Voltage	48 V DC nominal
	Nominal output power cos phi 0.8 lag	500 VA 800 VA 1100 VA
	Nominal output power at 1.0 cos phi	400 W 640 W 800 W
	Crest factor of load	2.25:1
	Nominal output voltage, single phase+neutral	110/220/230/240 V *
	Inverter	High frequency transistor with pulse width modulation (PWM), over temperature protection.
	Output transformer	Double wound isolation with galvanic separation
	Output filter	LC - circuit
	Output waveform	Sine-wave
	Output voltage regulation:
	static	+/- 1%
	at load step with 100 % load change	+/- 3%
	output distortion at linear load	<3%
	Output frequency	50(60) Hz
	Output frequency regulation:
	free running, from internal oscillator	+/- 0.1%
	with mains synchronisation	Up to +/-4%, normally +/-1%
	Overload capability	110% for 10 minutes 150% for 30 seconds 200% for 10 seconds
	Short-circuit characteristic	Electronic short-circuit protection
Bypass separate 19” rack module	Electronic automatic	Load transfer to mains and automatically back to inverter
	Maintenance bypass	Automatic or switch selectable by rotary switch on front panel
	Input and output	By 2 switches on front panel

*Supplied for single voltage single frequency operation

Miniverter Series RT

General
Ambient operating temperature to 40°C in relative humidity of 97% non condensing, at 1000 m above sea level is permitted without de-rating, conditions must be dust and damp free, and well ventilated.
RFI suppression level is in accordance with VDE 0875N.
Psophometric filtering for CCITT is available on inverters requested for Telecoms applications as an optional feature.

Colour
Colour is RAL 7032 with textured finish.

Enclosure
Enclosure class IP30 to IEC 529 for RTC product and IP 20 for RT.

Options

• Alternative enclosure class to IP 54
• Custom colours
• Digital metering
• Customers requested features

Notes

• Single phase means one phase + neutral and earth
• Three phase means three phase lines + neutral and earth
• The RTC version of this product is provided with a full height door and inner safety screen with EMC shield

Typical Scheme

Typical construction and dimensions

Our Industrial Miniverter Rugged Transistor (RT) series of rack constructionb Uninterruptible Power Supply Systems are designed to provide a high security power source for computer based process control, data logging, SCADA, military, telecommunications, rail signalling and Public Utilities applications especially Nuclear Power Stations. This product range has an active-on-line system topology comprising full capacity rectifier, transistor PWM inverter, static bypass and manual maintenance bypass.

During normal mains operation, the rectifier produces DC for charging the battery and power for the inverter load. The inverter uses the latest in transistor PWM switching technology and converts the DC into a precisely regulated AC sinusoidal output waveform low in harmonic content with excellent dynamic performance ideally suitable for handling high crest factor non-linear loads. In the event of input power failure, the Miniverter RT draws power from the battery and will continue to supply the critical load with AC power until the battery ‘low’ threshold is reached or until input power has been restored to the rectifier.

Where abnormal overload conditions or over temperature or current limit is reached in the inverter, the static bypass switch will be activated to transfer the critical load from the inverter to the bypass power source without interruption. The static bypass features an automatic return of the critical load from the bypass line to the inverter also without interrupting power supply to the load, a manual maintenance bypass is also provided as a standard feature.

Miniverter RTC series UPS Systems and inverters are available in a compact, integrated execution fitted with a full height front door, safety interior screen, EMC shield, mimic status and alarm panel and basic metering, a full metering option is available.

Specification (2.5 kVA, 3.3 kVA, 5 kVA, 8 kVA, 10 kVA and 12 kVA)

UPS system size		2.5	3.3	5.0	8.0	10.0	12.0
Rectifier	Input Voltage	230 Volts +/- 15%		400 Volts +/- 15%		400 Volts +/- 15%
	Frequency	50 Hz +/- 5%		50 Hz +/- 5%		50 Hz +/- 5%
	Phases	Single + neutral + earth		3 phases + neutral + earth		3 phases + neutral + earth
Inverter	Rated Capacity kVA/kW	2.5/2	3.3/2.7	5.0/4	8.0/6.4	10.0/8	12.0/9.6
	Output Voltage:
	- Single Phase	230	230	230	230	230	230
	- Three Phases	-	-	400	400	400	400
	Voltage Regulation:
	- Normal	+/- 1%	+/- 1%	+/- 1%	+/- 1%	+/- 1%	+/- 1%
	- Dynamic	+/-3%	+/-3%	+/-4%	+/-5%	+/-8%	+/-8%
	Frequency	50 Hz	50 Hz	50 Hz	50 Hz	50 Hz	50 Hz
	Phases:
	- Single Phase	Yes	Yes	Yes	Yes	Yes	Yes
	- Three Phases	No	No	Yes	Yes	Yes	Yes
	Load Power Factor	0.7 lagging to unity within kW capacity
	Harmonic Distortion	<3% THD linear load		<5% THD linear load
	Overload Capacity	150% for 30 secs 120% for 10 mins		150% for 30 secs 120% for 10 mins
	Audible noise at 1 metre	<57 dBA	<57 dBA	<57 dBA	<57 dBA	<57 dBA	<57 dBA
Bypass separate 19” rack module	Automatic synchronised static transfer switch with separate manual bypass circuit breaker for maintenance. A bypass isolation transformer and voltage regulating transformer are available as optional items.
Notes	Other voltages and frequencies available. Frequency stability is +/- 1% when synchronised to mains and +/- 0.01% when free running.

Selection Data - Miniverter 4

Selection Data - Miniverter RT/RTC