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CONSTANT WATTAGE HPS
  • Features:
  • Superior performance and lamp control over 10% variations in supply voltage
  • Low line starting current
  • Greater control of lamp power and colour temperature
  • Significant reduction in lamp flicker
  • High power factor characteristic 0.95 or higher
  • High input impedance to supply switching frequencies
  • Will sustain lamp operation with dips in supply voltageIn the order of 40-50%
    Features include
  • Long Service Life
  • Vacuum impregnation
  • Non-audible noise level
  • 300mm Long Flying Leads Provided
  • Winding insulation Class H materials
  • Fixed air Gap ensuring permanent calibration
  • Tw150 winding temperature rating
  • C-tick
    OPTIONAL EXTRAS INCLUDE:
  • Timer Long Distance Ignitors
  • Change Over Relays (SCR-8)
    Final 100% Testing:
  • Winding short & open Circuit Insulation



Constant wattage ballast although heavier, larger and more costly provides numerous advantages over reactor-ignitor gear. The lamp output power is maintained at a highly constant state, even over supply fluctuations, due to the regulation action of the auto-transformer. Hence the name Constant Wattage (CWA).

LAMP WATTS 250W 400W 400W 1000W 1000W
CHOKE PART NO. PHS250C240 PHS400C240 PHS400C415 PHS1000C240 PHS1000C415
LINE VOLTAGE 240V 240V 415V 240V 415V
LINESTART CURRENT 0.65A 1.10A 0.65A 3.00A 1.70A
LINE CURRENT 1.31A 2.04A 1.18A 4.60A 2.65A
LAMP VOLTAGE 100V 100V 100V 250V 250V
LAMPSTART CURRENT 4.05A 5.60A 5.60A 6.80A 6.80A
LAMP CURRENT 3.00A 4.60A 4.60A 4.70A 4.70A
IGNITOR IGH301 IGH301 IGH301 IGH301 IGH301
CAPACITOR PF. = 0.85-0.90 35uF 330V 48uF 330V 48uF 330V 28uF 525V 28uF 525V
LAMPS PHILIPS     GE     VENTURE     SYLVANIA   OSRAM
Constant Wattage HPS
Part Number   PHS400 PMH1000
Ballast dimensions A 65 100
B 100 140
C 153 153
D 115 115
E 180 180
F 155 155
G 140 140
H 109 109
Capacitor dimensions I 62 62
J 95 95
K 110 110
number of capacitors   2 1
ignitor dimensions L 35 35
M 55 55
N 80 80

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