Power Requirements; Quality Of Power; Transient Voltage; Voltage Regulation - Philips CARDIOMD Service Manual

Shipping, Handling, Installation and Storage
8.2.4

Power Requirements

8.2.4.1

Quality of Power

Power quality specifications are based on measurements taken at the nuclear room power
distribution panel.
8.2.4.2

Transient Voltage

> 240 V
180-240 V, < 100 µsec
90-180 V, < 400 µsec
50-90 V, < 800 µsec
Table 8.6 Transient voltage tolerances
Note. If transients on the line exceed specified tolerances, a transient suppressor is recommended
to prevent equipment damage.
8.2.4.3

Voltage Regulation

All combinations of line variation shall not cause the line-to-line or line voltage to deviate from
either its nominal or average value by more than 7 %, whichever is less. For example, assuming a
nominal voltage of 120 V, if the line sags below 111 V or surges above 128 V, an UPS line
conditioner is required. The need for UPS is covered in the section 8.2.4.4.
8.2.4.4

Brownouts

If there are consistent voltage losses exceeding a 30 % drop in peak voltage for more than 5
cycles, a battery uninterrupted power supply (UPS) is recommended. Uninterruptible power
supplies allow at least the case in progress to be completed and should be considered where there
is concern for periodic power loss from any cause (line drop-out, generator testing, etc.) of the
magnitude mentioned. The UPS also has significant benefit in that patient studies are not lost in
the event of power failure or generator test.
8.2.4.5

Source Configuration

The power source supplying CardioMD system shall be single phase, neutral plus dedicated/
isolated ground (3-wire).
Nominal AC Volts
Line Phase
Full Load kVA
Line Amps
Voltage Variation
Table 8.7 Power source configuration
8.2.4.6

Emergency Power

Emergency power is not necessary for CardioMD systems since the procedure being performed at
the time of the power failure would be lost anyway (unless the system is connected to an
uninterruptible power supply). An UPS is strongly suggested for each CardioMD system.
8-16 CardioMD Service Manual
None allowed
1/day max
6/hr, 24/day max
6/hr, 24/day max
100, 120, 200, 220 or 240
Single
1.4 kVA
12 A (100 – 120 V), 6.25 A (200 – 240 V)
+10% – 10% from nominal
1MAN0158-H11 04-2005 CSIP Level 1