Danfoss EC-C1200-450, Руководство пользователя

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Electric device has option for small systems (S) and large systems (L). Small system option is typical
for vehicle applications and large system option is standard in marine applications because of the
marine regulations. Complete system should be looked when choosing the option as for example
vehicle system with many devices could also need the L-option to keep the isolation resistance or
Y-capacitors at reasonable level. In large and small system options, there are difference in the
isolation measurement resistance, DC-link discharge resistor and Y-capacitor values as shown in
the gure and table below.
Figure 1. S- and L-systems schematics
Table 1. S- and L-system component values
System option Component Value
Small (S)
Resistors R1 and R2 (isolation measurement) 12 MΩ
Resistor R3 (discharge) 3.9 kΩ
Capacitors C1 and C2 (Y-capacitors) 330 nF
Capacitor C3 1 mF
Isolation resistance from DC-link to enclosure 6 MΩ
Large (L)
Resistors R1 and R2 (isolation measurement) 240 MΩ
Resistor R3 (discharge) 39 kΩ
Capacitors C1 and C2 (Y-capacitors) 3.3 nF
Capacitor, C3 1 mF
Isolation resistance from DC-link to enclosure 120 MΩ
EC-C1200-450
1. General information
| BC265735231757en-000109
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Danfoss | Produced By: Danfoss Power Solutions | January 2019 | 5