Speedrive

Summary

Product identification

The ESPA Speedrive (ESD) is a variable-frequency driver designed for integration with ESPA pump models including MULTI-ESD, PRISMA-ESD, XVM-ESD, XVM, Aspri, and Multi.

Available models:

• Speedrive M2 (Single-phase)
• Speedrive T3 (Three-phase)
• Speedrive T4 (Three-phase)

Operating limits

• IP 55 protection
• Maximum ambient temperature: 40 °C
• Minimum working frequency: Adjustable
• Acceleration ramp: 1 fixed
• Deceleration ramp: 1 fixed
• Stop temporisation: Yes

Electrical

The ESD unit regulates motor speed to maintain constant pressure based on a proportional signal from an external 4-20 mA pressure transducer.

Model-specific electrical data

• Speedrive M2 (Single-phase)
  • Power source voltage: 1~230 V AC ± 10 %
  • Motor voltage: 3~230 V AC
  • Maximum motor current: 7 A
  • Auxiliary relay: 1 for external alarm
  • Free power contact: 1 (maximum intensity 2 A, 1~230 V AC)
• Speedrive T3 (Three-phase)
  • Power source voltage: 3~400 V AC ± 10 %
  • Motor voltage: 3~400 V AC
  • Maximum motor current: 9 A
• Speedrive T4 (Three-phase)
  • Power source voltage: 3~400 V AC ± 10 %
  • Motor voltage: 3~400 V AC
  • Maximum motor current: 13 A

Common electrical features

• Configuration: Built into the junction box
• Cooling: Air-cooled
• Nominal motor frequency: 50 Hz/60 Hz
• Digital input for 4-20 mA transducer with 24-V DC power source
• Additional digital input: 1
• Additional analogical input: 1
• Level switch terminal: Yes
• PTC: Optional
• External communication port: RS 485

Mechanical / hydraulic

The ESD modules can control pressure booster sets with up to 4 pumps.

Dimensions and Weights

• Speedrive M2:
  • A: 128 mm
  • B: 71 mm
  • C: 207 mm
  • D: 207 mm
  • Weight: 2.2 kg
• Speedrive T3:
  • A: 142 mm
  • B: 85 mm
  • C: 207 mm
  • D: 207 mm
  • Weight: 2.5 kg
• Speedrive T4:
  • A: 142 mm
  • B: 85 mm
  • Weight: 2.5 kg
  • Note: C and D dimensions for T4 are not provided in the extracted text. See the official PDF for full tabulated values.

Features and Control

The ESD provides a high-quality, oscillation-free service by maintaining constant pressure regardless of flow demand, leading to improved efficiency and energy savings compared to fixed-speed systems.

Operating Modes and Parameters

The ESD features a backlit display and a 5-button keypad.

• Adjustable operating parameters:
  • Language: ES, EN, DE, IT, FR
  • Operation: AUTOMATIC – MANUAL
  • Set pressure: set point
  • Differential pressure: hysteresis or difference in the set pressure that marks the start-up of the pump
  • Maximum motor intensity: to regulate motor protection
  • Pump sleep frequency: can be set manually or automatically (ESD can automatically calculate based on installation characteristics and set pressure)
• Displayed parameters:
  • Set pressure
  • Differential pressure
  • Maximum motor intensity
  • Stoppage frequency
  • Pump stop temporisation
  • Module temperature
  • Alarm display: power surge, short-circuit, power failure, and module temperature
  • Operational register: number of start-ups, hours in operation, and hours online
• Password protection: Access to advanced parameter settings, deletion of operational register, and alarm history.

Pump Control Capabilities

• Constant pressure: Yes
• Constant flow: Programmable
• Second duty point: Programmable
• Dry running protection: Yes
• Motor rotation reversal
• Maximum number of pumps: Up to 4
• Maximum number of slave pumps (fixed speed): Up to 3

Booster Set Configurations

The ESD modules can control booster sets in two main ways:

1. Units with one single ESD module (Master variable-speed pump, auxiliary pumps in DOL start-up):

• CKED 2 pumps: Variable-speed main pump + fixed-speed DOL auxiliary pump.
• CKED 3 pumps: Variable-speed main pump + 2 fixed-speed randomly alternating DOL auxiliary pumps.
• CKED 4 pumps: Variable-speed main pump + 3 fixed-speed randomly alternating DOL auxiliary pumps.

2. Units with multiple ESD modules (up to 4 variable-speed pumps):

• CKE2: 2 pumps: variable-speed main pump + variable-speed auxiliary pump, both operating in cyclical duty changeover.
• CKE3: 3 pumps: variable-speed main pump + 2 variable-speed auxiliary pumps, all 3 operating in cyclical duty changeover.
• CKE4: 3 pumps: variable-speed main pump + 2 variable-speed auxiliary pumps, all 3 operating in cyclical duty changeover.
  • Note: For CKE4, the text specifically describes a configuration with 3 pumps.
  • In multi-ESD configurations, once auxiliary pumps activate, all regulated pumps operate in synchronization at the same frequency.

Electronic Circuit Components

The electronic circuit includes:

• EMC filter
• Input/output for cables
• Power circuit
• Aluminium radiator body
• Pressure transducer
• Device for digital pressure reading

Disclaimer

This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions from the official OEM PDF datasheet. Contractual data must always match the specific OEM PDF revision used for the project.

Official datasheet (PDF)

Lenntech datasheet mirror