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Bitzer 4G-30.2 Series User Manual

Bitzer 4G-30.2 Series
12 pages
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Anlaufentlastung
für BlTZER-Hubkolben-
Verdichter
Typen:
4FC-3.2(Y) .. 66F-100.2(Y)
S4T-5.2(Y) .. S66F-60.2(Y)
2T.2(Y) .. 6F.2(Y)
W2TA .. W6FA
Inhalt Seite
1 Allgemeines 1
2 Funktion 2
3 Auslegung und Ausführung
externer Anlaufentlastung 5
4 Prinzipschaltbilder 6
5 Integrierte Anlaufentlastung
montieren 7
6 Maßzeichnungen 10
1 Allgemeines
Bei Betrieb größerer Verdichter wer-
den von den Energieversorgungs-
Unternehmen vielfach Maßnahmen
zur Dämpfung des Anlaufstromes
(z. B. Teilwicklungs- oder Stern-Drei-
eck-Start) verlangt, um zu starke
Stoßbelastung des Stromnetzes zu
vermeiden. Derartige Anlaufmethoden
reduzieren das Anlaufmoment des
Verdichtermotors jedoch auf einen
Wert, der ein einwandfreies Hoch-
laufen nur bei geringen Druckunter-
schieden zulässt. Ähnliche Bedingun-
gen liegen bei Antrieb mittels Verbren-
nungsmotor vor. Maßgeblich sind dort
in erster Linie die Leistung des Anlas-
sers sowie der Momentenverlauf des
Motors.
Start Unloading for
BITZER Reciprocating
Compressors
Types:
4FC-3.2(Y) .. 66F-100.2(Y)
S4T-5.2(Y) .. S66F-60.2(Y)
2T.2(Y) .. 6F.2(Y)
W2TA .. W6FA
Content Page
1 General 1
2 Function 2
3 Selection and design of an
external start unloading 5
4 Schematic wiring diagrams 6
5 Mounting the integrated
start unloading 7
6 Dimensional drawings 10
1 General
Electrical power supply companies
very often demand measures to re-
duce the starting current (e.g. part
winding or star-delta start) when large
compressors are operated. This is to
avoid excessive loads on the supply
network. These starting modes reduce
the starting torque of the motor to a
value that only allows an acceleration
to full speed with a small pressure dif-
ference. Similar conditions apply to
the operation with an internal combus-
tion engine. The deciding factors are
the capacity of the starter and the
torque behaviour of the engine.
Démarrage à vide
pour des compresseurs
à pistons de BITZER
Types:
4FC-3.2(Y) .. 66F-100.2(Y)
S4T-5.2(Y) .. S66F-60.2(Y)
2T.2(Y) .. 6F.2(Y)
W2TA .. W6FA
Sommaire Page
1 Généralités 1
2 Fonction 2
3 Sélection et exécution d'un
démarrage à vide externe 5
4 Schémas de principe 6
5 Monter le démarrage à vide
integré 7
6 Croquis cotés 10
1 Généralités
Lors du service de compresseurs d'une
certaine importance, les sociétés distribu-
trices d'énergie électrique imposent des
mesures qui permettent de réduire l'appel
de courant au démarrage (tel que démar-
rage à bobinage partiel ou démarrage
étoile-triangle) afin d’eviter les perturba-
tions qui en résultent sur le réseau. Ce-
pendant ces méthodes de démarrage
réduisent généralement le couple de
démarrage de manière qu'un démarrage
correct ne peut être obtenu que pour de
faibles pressions différentielles. On trouve
des conditions similaires, si l'entraîne-
ment se fait à l'aide d'un moteur ther-
mique. Mais dans ce cas, la puissance du
démarreur et la caractéristique de couple
du moteur jouent un rôle prépondérant.
KT-110-3
Technische Information
Technical Information
Information Technique
Question and Answer IconNeed help?

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Bitzer 4G-30.2 Series Specifications

General IconGeneral
Oil charge3.5 liters
Degree of protectionIP54
Operating Voltage380-420V
Number of Cylinders4
RefrigerantR404A, R407C, R507A
Suction line connection1-3/8" SAE
Motor protectionSE-E1
Motor voltage380-420V
Frequency50 Hz

Summary

General Start Unloading Information

General Explanation of Start Unloading

Explains the necessity of start unloading for large compressors to reduce starting current and torque.

Functionality of Start Unloading

Integrated Start Unloading System

Details the integrated start unloading system, its bypass device, and solenoid valve control.

External Start Unloading Systems

External Start Unloading Design and Connection

Bypass Line Connection for External Unloading

Instructions for connecting the bypass line to discharge and suction sides using T-pieces.

Check Valve Selection for External Unloading

Guidelines for selecting and mounting check valves, focusing on gas pulsation and parallel systems.

Start Unloading Wiring Diagrams

Part Winding Start Wiring Diagram

Illustrates the wiring for part winding start, including solenoid valve and timer.

Star-Delta Start Wiring Diagram

Shows the wiring configuration for star-delta start with solenoid valve and timing relays.

Mounting Integrated Start Unloading

Mounting Gasket and Valve Parts

Procedures for fitting valve parts and gasket (464) before compressor evacuation.

Integrating Protection Devices

Steps to integrate the discharge gas temperature sensor into the safety chain of protection devices.

Optional Accessories for Start Unloading

Lists optional accessories such as check valves and temperature sensors available for purchase.

Subsequent Mounting Procedures

Dimensional Drawings of Compressors