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PAS-110/A

Compressor units type PAS-** meet to requirements of the European Directive 94/9/EC (ATEX) for equipment in group I, category M2, and can be used in methane and coal dust exsplosion hazardous areas of underground mines.

The PAS-55, PAS-75 and PAS-90 units are designed to allow for 500 or 1000 [V] connections via external changeovers. The PAS-22 units are manufactured as 500 or 1000[V] power voltage network compatible model types without the external changeover option. Optionally, the units may also be fitted with:

additional water-cooled oil cooler with water flow indicator,
electrical water shut-off valve for additional water-cooled oil cooler,
modules allowing for data transmission system connections.

Technical data

Item
minimum pumping pressure	MPa
performance	m³/min
supply voltage	-
motor power	kW
ambient temperature	°C
Parameters of water supply system for additional water-cooled oil cooler	-
maximum water pressure	MPa
minimum flow rate	l/min
Factory settings for pressure stabilization system	-
pressure switch	-
pressure switch	-
compressor operation time in neutral gear	s
lock-up time after turning the motor off	s
Compressed air network connection	cal
dimensions (length x width x height)	mm
Weight	kg
oil content	mg/m³
cooling type	-
certified with mark	-
certificate number	-

Item		PAS-110/A
minimum pumping pressure	MPa	0,75
performance	m³/min	18,1
supply voltage	-	500 V, 1000 V, 50 Hz *
motor power	kW	110
ambient temperature	°C	3÷40
Parameters of water supply system for additional water-cooled oil cooler	-
maximum water pressure	MPa	2,0
minimum flow rate	l/min	to 20
Factory settings for pressure stabilization system	-
pressure switch	-	0,65
pressure switch	-	0,40
compressor operation time in neutral gear	s	60
lock-up time after turning the motor off	s	60
Compressed air network connection	cal	G 2
dimensions (length x width x height)	mm	2700 x 1000 x 1450
Weight	kg	2750
oil content	mg/m³	3
cooling type	-	air, air-water
certified with mark	-	-
certificate number	-	OBAC 05ATEX435x

* optional power voltages are available as per client's request

Dimensional drawings

External dimensions

Internal dimensions

Application

The explosion-proof compressor units series PAS are designed for operating in mine underground pits, in „a", „b" and „c" methane explosion hazard and „A" and „B" coal dust explosion hazard locations. The units may be used for supplying power directly to the machines powered with compressed air or as power supply systems for compressed air pipeline networks.

Design

The structure of the PAS-22, PAS-55, PAS-75 and PAS-90 compressor units is based on a screw compressor assembly. The units are air-cooled and in case of locations with low air circulation or high ambient temperatures, the units may be fitted with additional water-cooled oil cooler that utilizes water from the fire pipeline. The units are fitted in a solid container- like casing equipped with runners and handles for all transportation needs. Smaller width of the PAS-75 and PAS-90 units as compared with previous S-75G compressors ensures easy carriage and machine placement in drifts. The units are equipped with automatic control systems for ensuring safe and hand-free operation.
The compressor units are controlled by means of an RGS type starter as their integral part. The RGS starters are fitted with safety mechanisms protecting them against: increasing temperatures in motor windings, short-circuits, overloads, current and voltage asymmetries, excessive symmetrical voltage drops, incorrect phase sequence and excessive insulation resistance drops. The units are also fitted with a „load on/load off" pressure stabilization system. The structure of the pressure stabilization system is based on a pressure switch where low and high compressor pumping pressure values are set. The „load on/load off" system allows for:

closing air intake after reaching the high pumping pressure value - switching to neutral gear operation,
when in neutral gear, turning off the compressor motor in case the pumping pressure does not drop below the minimum pressure value,
opening air intake or turning the compressor motor on automatically (depending on operation mode) in case pressure drops below the minimum value.

In addition to the above, the units are fitted with oil and air filter contamination indicators, a manometer for measuring oil separator contamination levels, an „Active Self-Cleaning Line" and safety systems for protecting the units against high oil and compressed air temperatures.
The units are compatible with the systems used for transmitting the compressor data, e.g. to mine's ground level.