Carbolite LHT Handbuch für Installation, Betrieb und Wartung - Seite 4

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High Temperature Ovens
2.3
Electrical Connections
Connection by a qualified electrician is recommended.
All ovens covered by this manual may be ordered for single phase A.C. supply, which may be
Live to Neutral non-reversible, Live to Neutral reversible or Live to Live. Some models may be
ordered for use on a three phase supply with neutral (e.g. 380/220V) or for three phase without
neutral (delta); some for two phases out of a 3-phase + neutral supply.
Check the Oven rating label before connection. The supply voltage should agree with the voltage
on the label, and the supply capacity should be sufficient for the amperage on the label.
The supply should be fused at the next size equal to or higher than the amperage on the label. A
table of the most common fuse ratings is also given in section 8.1 of this manual. Where a supply
cable is present there are internal supply fuses; customer fusing is preferred but not essential.
Oven with supply cable: either wire directly to an isolator or fit with a line plug.
Oven without supply cable: a permanent connection to a fused and isolated supply should be made
to the internal terminals after temporary removal of the Oven back panel.
Connection by line plug: the plug should be within reach of the operator, and should be quickly
removable.
Connection to isolating switch: this should operate on both conductors (single phase) or on all live
conductors (three phase), and should be within reach of the operator.
The supply MUST incorporate an earth (ground).
CONNECTION DETAILS
Supply
1-phase
supply
2- or 3-phase
4
Terminal label
Cable colour
L
Brown
N
Blue
PE
Green/Yellow
Terminal label
Cable colour
L1
Black
L2
Black
L3
Black
N
Light Blue
PE
Green/Yellow
supply type
Live-Neutral
Reversible or Live-Live
To live
to either power conductor
To neutral
to the other power conductor
To earth (ground)
to earth (ground)
to phase 1
to phase 2
to phase 3 except 2-phase
to neutral except delta
to earth (ground)
MF16