Eurotherm 7000 Series, Руководство пользователя

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Identification
7300A User Manual
1-6
1.2.6. Command
Supply Self-powered from line or external power supply
(115 V or 230 V +10%; -15%) depending on order code.
Consumption: 10 VA.
Control type Analogue (digital communication optional)
• either remote analogue setpoint:
0-5 V or 0-10 V (100 k
Ω
input),
0-20 mA or 4-20 mA (250
Ω
input)
• or manual setpoint (potentiometer):
5 V user voltage output available (max. 2 mA).
1.2.7. Firing modes
Zero crossing firing • Burst mode, base time: 16 or 64 cycles
• Single-cycle, 1 base cycle
• Advanced single-cycle, 1 base cycle
firing by whole cycles,
non-firing by half cycles;
(not available for 3S and 3D three-phase load
configuration)
Firing angle variation • Phase angle
1.2.8. Control
Control parameter • Standard (on balanced three-phase supply):
Load voltage squared (V
2
)
• Option:
- Apparent power (V . I)
with mean of 3 phase currents
- Mean of square of 3 load currents (I
2
) in
Phase angle mode
- Open loop in Phase angle mode.
Linearity and Stability Better than ±2% of full scale.
Current limit Option, depending on firing mode:
• Phase angle:
Automatic control transfer:
V
2
<-> I
2
, or V . I <-> I
2
,
Current recalibration set by potentiometer on front panel.
• Burst mode, 16 cycle base:
Current limit with threshold, set by potentiometer on
front panel.
Safety ramp After each power up or after stopping firing for 5 s or more
(Burst mode firing with Phase angle limiting).
Calibration A control signal is available in V
.
I control for power and
current calibration and for maintenance.
Transient current limit Option to control transformer primaries
in Burst mode:
• Magnetisation ramp in phase angle variation on first
power up.
• Adjustable delay for first firing.