Xylem hydrovar, Инструкция по установке, эксплуатации и обслуживанию

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The X-axis shows the ratio between Imotor actual and Imotor nominal. The Y-axis shows
the time in seconds before the STC cuts off and trips the frequency converter. The curves
show the characteristic nominal speed, at twice the nominal speed and at 20% of the
nominal speed. The curve shows that at lower speed the STC cuts off at lower heat due to
less cooling of the motor. In that way, the motor is protected from overheating even at low
speed. The STC function calculates the motor temperature that is based on actual current
and speed.
The calculated percentage of allowed maximum temperature is visible as a readout in par.
293 "Motor Thermal".
With the STC the motor is protected from being overheated and there is no need for any
further motor protection. That means when the motor is heated up the STC timer controls
how long the motor can be operated at the high temperature before it is stopped in order
to prevent overheating.
Motor thermal protection can also be achieved using an external thermistor: set par. 290
"STC Motor Protection" to data value "Thermistor trip".
3.7 Dimensions and weights
Reading instructions
All measurements are in millimeters (inches).
The images are not to scale.
Free distance
Area Models Free distance
Above the unit All > 300 mm (12 in)
Center-distance between units (to
ensure space for cabling):
HVL 2.015 ÷ 2.022 | 3.015 ÷ 3.022 |
4.015 ÷ 4.040
> 300 mm (12 in)
HVL 2.030 ÷ 2.040 | 3.030 ÷ 3.055 |
4.055 ÷ 4.110
> 430 mm (17 in)
HVL 3.075 ÷ 3.110 | 4.150 ÷ 4.220 > 550 mm (21,6 in)
Dimensional drawings
216
243
170
205
HVNG-IOM_HVLA_DIMENSIONS_A_SC
Figure 4: HVL2.015, HVL2.022, HVL3.015, HVL3.022, HVL4.015 ÷ HVL4.040
3 Product Description
HVL 2.015-4.220 Installation, Operation, and Maintenance Manual 17